Between the Roomba i7+ and S9 MaxV Ultra, the Roomba i7+ comes out ahead in several specs, while the S9 MaxV Ultra wins on battery life and noise. Overall, the Roomba i7+ scores 37.2 and the S9 MaxV Ultra scores 85.1 on our Mars Score.
Which should you buy?
The S9 MaxV Ultra is the clear pick on raw spec strength, leading by 47.9 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 S9 MaxV Ultra if you care most about battery life and noise. Its strongest claims are battery life, noise, mopping, among others.
Both ship with comparable self-empty base, so those specs don't separate the two — focus on the differences below.
Bottom line: the S9 MaxV Ultra 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 Roborock - S9 MaxV Ultra wins
- ▲Battery life — 140.00% more. 180 min vs 75 min.
- ▲Noise — 3.00 dB less. 65 vs 68.
- ▲Has Mopping.
- ▲Has Lidar.
- ▲Has AI obstacle avoidance.
- ▲Suction: 22000 Pa vs 0 Pa.
- ▲Water tank: 300 ml vs 0 ml.
Spec comparison
Cleaning
| Spec | iRobot - Roomba i7+ | Roborock - S9 MaxV Ultra |
|---|---|---|
| Suction | 0 Pa | 22000 Palead |
| Mopping | false | truelead |
| Water tank | 0 ml | 300 mllead |
| Dustbin | 400 mllead | 350 ml |
| Carpet detection | true | true |
Navigation
| Spec | iRobot - Roomba i7+ | Roborock - S9 MaxV Ultra |
|---|---|---|
| Lidar | false | truelead |
| Camera navigation | true | true |
| AI obstacle avoidance | false | truelead |
| Max climb | 20 mm | 40 mmlead |
Autonomy
| Spec | iRobot - Roomba i7+ | Roborock - S9 MaxV Ultra |
|---|---|---|
| Battery life | 75 min | 180 minlead |
| Self-empty base | true | true |
| Self-wash mop | false | truelead |
| Self-dry mop | false | truelead |
| Noise | 68 dB | 65 dBlead |
Frequently asked
Which has stronger suction, Roomba i7+ or S9 MaxV Ultra?+
S9 MaxV Ultra delivers 22000 Pa vs 0 Pa.
Do Roomba i7+ or S9 MaxV Ultra mop?+
S9 MaxV Ultra mops; Roomba i7+ vacuums only.
Which has a self-emptying base, Roomba i7+ or S9 MaxV Ultra?+
Both ship with a self-emptying base.
Spec-level deep dives
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