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Roomba i3+ vs. i7+ vs i6+ vs. i8+ Face to Face Comparison Review

Roomba i3+ vs. i7+ vs i6+ vs. i8+Massachusetts robot vacuum brand iRobot just released two new models that fall in the I series line of vacuums that had just one model, the i7/i7+.

The new entrants to this series are the i3/i3+ and i8/i8+.

In this Roomba i3+ vs. i7+ vs. i6+ vs. i8+ comparison review, we have put the three models to a contest to determine the best bang for the buck. Find out the similarities and differences.

But before getting into the main business of the day, here is an overview of the models.

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Roomba i7 vs. i7+

The Roomba i7 (7150) and Roomba i7+ (7550) were released in September 2018 and were the industry’s first self-emptying robot vacuums.

The two are similar from all angles except for the accessories included. The Roomba 7150 is the base model and doesn’t come with the Clean Base™ Automatic Dirt Disposal unit, while the Roomba 7550 comes with the Clean Base™ Automatic Dirt Disposal unit.

The i7 and i7+ also debuted the new iAdapt 3.0 navigation and mapping system, which brought on board Imprint™ Smart Mapping technology, enabling homeowners to choose specific rooms or areas to clean.

Roomba i6 vs i6+

Roomba i6+

Roomba i6+
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The Roomba i6 and i6+ have been around since Amazon Prime Day. The two models are compatible with the self-emptying technology. The i6 doesn’t come with the CleanBase unit while the i6+ comes with the unit.

For the record, the Roomba i6 and i6+ are Amazon exclusive variants of the i7 and i7+. The difference between the i6/i6+ vs i7/i7+ is the fact that the former comes with an extra side brush and filter. Otherwise, all the other features are the same.

Roomba i3 vs. i3+

Roomba i3 (3150) and Roomba i3+ (3550) are the latest Roombas released in September 2020. The two are entry-level Roombas that tag along with self-emptying bin technology.

The i3 and i3+ share the same features, but the difference comes in the accessories. The basic model, the i3, doesn’t include the Clean Base™ Automatic Dirt Disposal unit, but it is compatible with the technology. If you want a model that comes with the accessory, buy the Roomba i3+.

As mentioned above, these two are entry-level Roombas, so don’t expect them to have the same features that high-end models such as the S9 have. But it is worth mentioning iRobot Genius™ Home Intelligence, a new feature that unlocks intelligent features such as event-based automation, recommended cleaning schedules, and pre-set cleaning routines.

There’s also a debate between Roomba i3 vs. i4, and for the record, Roomba i4 (4150) and i4+ (4550) are basically Costco’s versions of the i3 and i3+.

Roomba i8 vs. i8+

Roomba i8The Roomba i8 (8150) and Roomba i8+ (8550) are the other two Roombas released in September 2020. The duo also features automatic self-emptying technology and is very much similar to the Roomba i7.

The Roomba i8 doesn’t include the Clean Base™ Automatic Dirt Disposal unit, but it supports the technology. On the other hand, the i8+ comes with the Clean Base™ Automatic Dirt Disposal unit in the package.

For the record, the Roomba i8 and i8+ are not available on Amazon as they are Costco-specific models. Most websites claim that they pack the same features that the i7 and i7+ have, but this is not true. There is a slight difference between Roomba i7+ vs. i8+, which is among the things we’ll be looking at in this Roomba i3+ vs i7+ vs i8+ comparison review.

Roomba i3+ vs i7+ vs i6+ vs i8+ Face to Face Comparison Review

Now that you are acquainted with a thing or two about the models in this review let’s get into the finer details.

1. Design and Aesthetics

Roomba i3+ vs. i7+ vs i6+ vs. i8+
The design of a Roomba is important when it comes to handling the deep corners and wall edges. But aesthetics have nothing to do with the cleaning performance. So, how do the three Roombas compare in terms of design and aesthetics?

  • Roomba i7/i7+ and i6/i6+ have a round shape design and are much similar to the previous models. In terms of dimensions and weight, the two units have a 13.34-inches diameter and stand at 3.63-inches. Regarding the weight, the two are 7.44lbs without the Clean Base™ Automatic Dirt Disposal unit. The finish is black for the US model, but the Chinese version is black with silver accents.
  • Roomba i3 and i3+ are also round-shaped Roombas with a 13.26-inches diameter and are 3.63-inches high. This is quite different from what is expected now that the other new Roomba, the S9, and S9+ are D-shaped, like Neatos. As for the weight, the two units are 7.44lbs without the Clean Base™ Automatic Dirt Disposal unit. Regarding the finish, Roomba i3/i3+ have a greying woven-textured top panel.
  • The Roomba i8 and i8+ have the same round-shaped design, with almost the same dimensions and weight as the Roomba i3/i3+ and i7/i7+. The diameter is 13.26-inches, while the height is 3.63-inches. On the other hand, the weight is 7.44lbs, of course, without the Clean Base™ Automatic Dirt Disposal unit. Regarding the finish, the i8/i8+ is available in black.

2. Cleaning Performance

The most important consideration when choosing the best Roomba is cleaning performance. In this section, we will dissect these three Roombas to find out what each one is best for, and more so, the individual components that define the cleaning performance.

(a) Orientation

Make sure the Roomba you buy can handle all your immediate cleaning needs, be it bare floors, pet messes, or carpets.
Roomba i3+ vs. i7+ vs i6+ vs. i8+

  • The Roomba i3/i3+ has been designed to clean all types of bare floors, talk of hardwood, tile, vinyl, and ceramic. The robot has also been designed to handle pet hair, but then, it struggles on carpets.
  • The Roomba i7/i7+ and i6/i6+, on the other hand, is not in any way different from Roomba i3. It’s also ideal for cleaning bare floors and pet hairs. But on carpets, it doesn’t guarantee the best performance.
  • Last is the i8/i8+, which is just the same as the other two Roombas in this comparison review. It is also ideal for cleaning bare floors and pet hair but still struggles on carpets.

(b) Suction Power

The vacuum power of a robot vacuum can be the deal maker or breaker. The best choice should be a robot vacuum with high suction power and adjustable suction levels.

roomba i3
Roomba i3/i3+, despite being one of the new models, uses a 2nd Gen motor that delivers 10X the air power that Roomba 600 models put up. For the record, this is a single-speed motor that yields 900pa.
Roomba-i7
The Roomba i7/i7+ and i6/i6+ also rely on a 2nd Gen motor, which delivers 10X the air power compared to the 600 series Roombas. The average suction power is also 900pa, which is not enough to handle carpets.
Roomba i8
Last is the Roomba i8/i8+ and this one too uses a single speed 2nd Gen motor that produces 10X the air power compared to the 600 series. On average, it also yields 900pa.

(c) Brush System

The brush system is also an important component of Roomba’s cleaning system, dubbed the 3-stage cleaning system. It is responsible for agitation and dirt pickup.

  • Roomba i3/i3+ comes with the new AeroForce brush system, which includes a single side sweeping brush and a dual multi-surface brushroll. Worth noting is the dual multi-surface brushroll that consists of two brushes: one for agitation and another for dirt pickup.
  • Next up is the Roomba i6/i6+ and i7/i7+, which also use the iRobot AeroForce technology that consists of a side sweeping brush and a primary brush. The primary brush also has a dual multi-surface design.
  • The i8/i8+, on the other hand, maintains the AeroForce brush system that is present in the i3 and i7, so you get the same performance.

(d) Filtration

While the three Roombas are similar in the other areas, there is a slight difference in the filtration. Here, we will assess the filters, bin capacity and features, bin emptying technology, accessories included, and seal system.

Roomba-i7
Next up is Roomba i7/i7+ and i6/i6+, which share the same filtration features just as i3 and i3+. It also comes with one high-efficiency filter that captures 99% of allergens.

The bin is 0.3L, which is smaller than what you get with the i3, but the full bin indicator is still intact.

Regarding self-emptying, only the i7+ comes with the CleanBase unit, but the i7 can also work with the technology if you buy the unit separately.

roomba i3
Roomba i3 and i3+ come with one high-efficiency filter that captures 99% of allergens such as pollen, dust mites, molds, and pet allergens.

The inbuilt bin capacity is 0.5L, and there’s a full bin indicator. Now, while both robot vacuums work with the iRobot self-emptying bin system, only the i3+ (3550) comes with the unit. But you can still purchase the Clean Base unit separately and use it on the i3 (3150).

For the record, the i3 comes with a disposable bag that can hold 30 days of dirt.

Roomba i8
Last is the Roomba i8 and i8+, which also has a high-efficiency filter with an impressive 99% efficiency in capturing all types of allergens.

The bin capacity is 0.3L, and the full bin indicator is also present. Regarding self-emptying, the Roomba i8 and i8+ work with the iRobot self-emptying technology, but only the i8+ comes with the CleanBase unit.

One big difference between Roomba i3+ vs. i7+ and i8+ is that the i8+ and i7+ have two Clean Base® Automatic Dirt Disposal with AllergenLock™ bags that can hold 60 days of dirt.

(e) Dirt Detect

Roomba i3 Dirt DetectOne of the unique offerings of iRobot is Dirt Detect, a technology that identifies spots with concentrated dirt. There are two variants of the technology; Dirt Detect Series I and Dirt Detect Series II.

  • Roomba i3 and i3+ come with Dirt Detect Series II, which uses optic and acoustic sensors to detect dirt.
  • Roomba i7/i7+ and i6/i6+ also use Dirt Detect Series II.
  • The i8 and i8+ also deploy Dirt Detect Series II.

(f) Cleaning Test Results

In this section, find how each of these Roombas performed in a real household setting. We tested them on bare floors, low and high pile carpets using the everyday household dirt, talk of flour, sugar, glucose, sand pebbles, long and short dog hair, kitty litter, and Cheerios.

3. Battery and Autonomy

In this section, we want to find out about these three Roombas’ battery capacity, the runtime, and, most importantly, power management.

  • Roomba i7/i7+ and i6/i6+ come with a smaller 1800mAh battery that runs for 75 minutes compared to its predecessor, Roomba 980, that has a 120 minutes runtime. This is a lithium-ion battery that automatically recharges and resumes cleaning.
  • Next up is the Roomba i3 and i3+, which also has a 1800mAh lithium-ion battery that lasts for 75 minutes. This one too recharges and resumes cleaning automatically.
  • The Roomba i8 and i8+ take a different approach here. The two come with the Roomba® i8 Denali 2210mAh battery mAh battery that offers an impressive 90 minutes runtime. This one too recharges and resumes cleaning automatically.

4. Navigation, Mapping, and Boundary Marking

In this section, we will assess how these three Roombas navigate around the house and map the floors.

(a) Navigation

Roomba NavigationThe old Roomba navigation technology is SLAM (Simultaneous Localization and Mapping)-based while the newer models use VSLAM (Visual Simultaneous Localization and Mapping). The latter is the best, especially if you have high traffic rooms.

  • Roomba i3 and i3+ are basic Roombas and use iAdapt 1.0, a SLAM-based navigation system. The robot has obstacle detection sensors and cliff detection sensors, which aid the robot in localization and prevent accidents such as hitting obstacles or falling off the stairs.
  • The Roomba i7/i7+ and i6/i6+, on the other hand, comes with iAdapt 3.0, a VSLAM navigation system. This system is similar to the previous iAdapt 2.0 relies on sensors and a real-time camera for navigation. It is the best choice if you have high traffic rooms and large apartments.
  • Last is the Roomba i8 and i8+, which also use the iAdapt 3.0 navigation system. It is also suitable for high traffic rooms and large apartments, just like the i7 and i7+.

(b) Floor Mapping and Boundary Marking

Roomba Mapping Besides navigation, it’s important to assess the floor mapping technology used to ensure your Roomba cleans every inch of your floor fast and efficiently.

  • The Roomba i7/i7+ and i6/i6+ have an intelligent floor mapping system that learns, maps, and adapts to your home’s layout. It is called Imprint Smart Mapping and is the main addition in the new iAdapt 3.0 technology. With this technology, you can tell the Roomba to clean specific rooms and avoid others. When it comes to boundary mapping, we are glad iRobot ditched the strenuous physical barriers (Virtual Walls and Virtual Walls & Lighthouses) for digital barriers (Keep Out Zones) that can be set right from the mobile app.
  • The Roomba i8 and i8+ also come with iAdapt 3.0, meaning they have Imprint Smart Mapping. These, too, can learn, map, and adapt to your home’s layout for accurate and precise cleaning. You can also tell the I8+ to clean specific rooms instead of vacuuming the entire house. Regarding boundary marking, Keep Out Zones, the digital barrier is still intact. Besides, the two come with one 1 Dual Mode Virtual Wall® Barrier.
  • Last is the Roomba i3 and i3+, which are quite different here as they don’t have an intelligent floor mapping system. But still, they do a great job in small to medium-sized apartments with less traffic. One of the major shortcomings of these Roombas is that they don’t have Keep Out Zones.

5. Smart Features and Convenience

In this smart home era, you definitely want to buy a robot vacuum that is smart ready. In this section, we will analyze all the smart features that these Roombas have.

Roomba-i7
Roomba i7/i7+ and i6/i6+ are both smart robot vacuums that support a 2.4Ghz Wi-Fi connection. The Roomba works with the iRobot Home app that gives users total control of the robot vacuum remotely, as long as the Roomba is connected to a stable Wi-Fi connection.

The i7 and i7+ also work with Google Assistant and Alexa, and besides, they have Imprint Link Technology that allows them to sync with the Braava M6 for simultaneous vacuuming and mopping.

roomba i3
Roomba i3 and i3+ are also Wi-Fi connected Roombas, so you can control them right from the mobile app.

Unfortunately, the app doesn’t have all the features that the other high-end Roombas have, for example, digital barriers. But then, it is compatible with iRobot Genius Home Intelligence and also syncs with the Braava M6 courtesy of Imprint Link Technology.

The i3 and i3+ also work with Alexa and Google Assistant.

Roomba i8
Last is the Roomba i8 and i8+, which offer the same features just as the Roomba i7 and i7+. The two come with Wi-Fi for smartphone app operation and voice assistant compatibility.

The app features include customizable cleaning, clean map reports, etc.

  • Why Roomba i3/i3+
The Roomba i3 and i3+ are the best affordable Roombas with automatic self-emptying bins. The two are also compatible with iRobot Genius Home Intelligence, a pretty new technology that gives homeowners greater control of where, when, and how their house is cleaned. It’s more appealing to the eye courtesy of the woven texture, which besides aesthetics, minimizes fingerprint smudges and dust collection.

But unfortunately, it is a basic model that lacks key features such as intelligent navigation and mapping, and more so, it doesn’t have digital boundary marking. But for its price, it still a great bang for the buck.

  • Why Roomba i8/i8+
The Roomba i8 and i8+ are very much similar to the Roomba i7 and i7+. But in a battle between Roomba i7 vs. i8, the latter is the winner as it comes with a much larger battery that lasts longer. But unfortunately, this model is available at Costco only. Maybe it will find its way to Amazon sometime later.

  • Why Roomba i7/i7+
The Roomba i7 and i7+ comes with most of the top features from the Massachusetts brand. If you really like the Roomba i8, but you can’t purchase it at Costco, this one is the best alternative. It comes with automatic self-emptying, iAdapt 3.0 VSLAM navigation, digital barriers, and a host of smart features.

  • Why Roomba i6/i6+
The Roomba i6/i6+ are models exclusive to Amazon. While they are the same as the i7/i7+, they come with extra accessories. If you want the best value for money, this is the way to go.

Roomba i3+ vs i7+ vs i8+ Summary

There you have it, folks, a comprehensive Roomba i3+ vs. i7+ vs. i8+ comprehensive review. While these models are quite similar, the differences are profound. The Roomba i3 and i4 are basically the same model, only that the i4 is a Costco model.

On the other hand, the Roomba i6, i7 and i8 are also the same model save for the difference in the runtime. If you are buying on Amazon, the battle here is between Roomba i6+/ i7+ vs. i3+. The former is the best if you want the best in class features, while the latter is best if you are on a tight budget.

John Reyes

This is a great article and answered all my questions about the similarities and differences of all the Roomba models. This information is not available on the iRobot site.

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