Roborock - S9 MaxV Ultra vs iRobot - Roomba Combo 10 Max
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Roborock - S9 MaxV Ultra | iRobot - Roomba Combo 10 Max |
|---|---|---|
| Water tank | 300 ml | 210 ml |
| Noise | 65 dB | 70 dB |
| Lidar | true | false |
| Suction | 22000 Pa |
Between the S9 MaxV Ultra and Roomba Combo 10 Max, the S9 MaxV Ultra comes out ahead in water tank / noise, while the Roomba Combo 10 Max wins on several specs. Overall, the S9 MaxV Ultra scores 88 and the Roomba Combo 10 Max scores 71.9 on our Mars Score.
Which should you buy?
The S9 MaxV Ultra is the clear pick on raw spec strength, leading by 16.1 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.
Pick the S9 MaxV Ultra if you care most about water tank / noise. The biggest gaps in its favor are water tank, noise, lidar, among others. The single most decisive one: Water tank — 42.86% more. 300 ml vs 210 ml.
The Roomba Combo 10 Max similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable mopping, battery life, self-empty base, so those specs do not 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.
Which should you buy: Roborock - S9 MaxV Ultra or iRobot - Roomba Combo 10 Max?
Roborock - S9 MaxV Ultra leads the current Mars Score by 16.1 points.The more useful decision is the trade-off behind that result: compare suction against the way you will actually use the product.
Choose Roborock - S9 MaxV Ultra if…
Roborock - S9 MaxV Ultra has the measurable edge on water tank capacity ml, noise db, has lidar.
Choose iRobot - Roomba Combo 10 Max if…
iRobot - Roomba Combo 10 Max does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Roborock - S9 MaxV Ultra wins
- ▲Water tank — 42.86% more. 300 ml vs 210 ml.
- ▲Noise — 5.00 dB less. 65 vs 70.
- ▲Has Lidar.
- ▲Suction: 22000 Pa vs Pa.
Why iRobot - Roomba Combo 10 Max wins
- No decisive advantages.
Spec comparison
Cleaning
| Spec | Roborock - S9 MaxV Ultra | iRobot - Roomba Combo 10 Max |
|---|---|---|
| Suction | 22000 Palead | |
| Mopping | true | true |
| Water tank | 300 mllead | 210 ml |
| Dustbin | 350 ml | 500 mllead |
| Carpet detection | true | true |
Navigation
| Spec | Roborock - S9 MaxV Ultra | iRobot - Roomba Combo 10 Max |
|---|---|---|
| Lidar | truelead | false |
| Camera navigation | true | true |
| AI obstacle avoidance | true | true |
| Max climb | 40 mmlead | 20 mm |
Autonomy
| Spec | Roborock - S9 MaxV Ultra | iRobot - Roomba Combo 10 Max |
|---|---|---|
| Battery life | 180 min | 180 min |
| Self-empty base | true | true |
| Self-wash mop | true | true |
| Self-dry mop | true | true |
| Noise | 65 dBlead | 70 dB |
Frequently asked
Which has stronger suction, S9 MaxV Ultra or Roomba Combo 10 Max?+
S9 MaxV Ultra delivers 22000 Pa vs Pa.
Do S9 MaxV Ultra or Roomba Combo 10 Max mop?+
Both can mop.
Which has a self-emptying base, S9 MaxV Ultra or Roomba Combo 10 Max?+
Both ship with a self-emptying base.