Between the Roomba i7+ and Roomba j9+, the Roomba i7+ comes out ahead in several specs, while the Roomba j9+ wins on battery life and ai obstacle avoidance. Overall, the Roomba i7+ scores 37.2 and the Roomba j9+ scores 49.8 on our Mars Score.
Which should you buy?
The Roomba j9+ is the clear pick on raw spec strength, leading by 12.6 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
The Roomba i7+ doesn't pull ahead on any single popular-comparison spec — its strengths sit in the spec table groups rather than the headline advantages.
Pick the Roomba j9+ if you care most about battery life and ai obstacle avoidance. Its strongest claims are battery life, ai obstacle avoidance.
Both ship with comparable suction, mopping, lidar, so those specs don't separate the two — focus on the differences below.
Bottom line: the Roomba j9+ is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why iRobot - Roomba i7+ wins
- No decisive advantages.
Why iRobot - Roomba j9+ wins
- ▲Battery life — 166.67% more. 200 min vs 75 min.
- ▲Has AI obstacle avoidance.
Spec comparison
Cleaning
| Spec | iRobot - Roomba i7+ | iRobot - Roomba j9+ |
|---|---|---|
| Suction | 0 Pa | 0 Pa |
| Mopping | false | false |
| Water tank | 0 ml | 0 ml |
| Dustbin | 400 ml | 500 mllead |
| Carpet detection | true | true |
Navigation
| Spec | iRobot - Roomba i7+ | iRobot - Roomba j9+ |
|---|---|---|
| Lidar | false | false |
| Camera navigation | true | true |
| AI obstacle avoidance | false | truelead |
| Max climb | 20 mm | 20 mm |
Autonomy
| Spec | iRobot - Roomba i7+ | iRobot - Roomba j9+ |
|---|---|---|
| Battery life | 75 min | 200 minlead |
| Self-empty base | true | true |
| Self-wash mop | false | false |
| Self-dry mop | false | false |
| Noise | 68 dB | 68 dB |
Frequently asked
Which has stronger suction, Roomba i7+ or Roomba j9+?+
Roomba j9+ delivers 0 Pa vs 0 Pa.
Do Roomba i7+ or Roomba j9+ mop?+
Neither mops.
Which has a self-emptying base, Roomba i7+ or Roomba j9+?+
Both ship with a self-emptying base.
Spec-level deep dives
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