Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Dreame - X40 Ultra | iRobot - Roomba Combo 10 Max |
|---|---|---|
| Water tank | 270 ml | 210 ml |
| Battery life | 210 min | 180 min |
| Noise | 65 dB | 70 dB |
| Lidar | true | false |
| Suction | 12000 Pa |
Between the X40 Ultra and Roomba Combo 10 Max, the X40 Ultra comes out ahead in water tank / battery life, while the Roomba Combo 10 Max wins on several specs. Overall, the X40 Ultra scores 83.9 and the Roomba Combo 10 Max scores 71.9 on our Mars Score.
Which should you buy?
The X40 Ultra is the clear pick on raw spec strength, leading by 12.0 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 X40 Ultra if you care most about water tank / battery life. The biggest gaps in its favor are water tank, battery life, noise, among others. The single most decisive one: Water tank — 28.57% more. 270 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, self-empty base, ai obstacle avoidance, so those specs do not separate the two — focus on the differences below.
Bottom line: the X40 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: Dreame - X40 Ultra or iRobot - Roomba Combo 10 Max?
Dreame - X40 Ultra leads the current Mars Score by 12.0 points.The more useful decision is the trade-off behind that result: compare suction, battery life against the way you will actually use the product.
Choose Dreame - X40 Ultra if…
Dreame - X40 Ultra has the measurable edge on water tank capacity ml, battery life min, noise db.
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 Dreame - X40 Ultra wins
- ▲Water tank — 28.57% more. 270 ml vs 210 ml.
- ▲Battery life — 16.67% more. 210 min vs 180 min.
- ▲Noise — 5.00 dB less. 65 vs 70.
- ▲Has Lidar.
- ▲Suction: 12000 Pa vs Pa.
Why iRobot - Roomba Combo 10 Max wins
- No decisive advantages.
Spec comparison
Cleaning
| Spec | Dreame - X40 Ultra | iRobot - Roomba Combo 10 Max |
|---|---|---|
| Suction | 12000 Palead | |
| Mopping | true | true |
| Water tank | 270 mllead | 210 ml |
| Dustbin | 350 ml | 500 mllead |
| Carpet detection | true | true |
Navigation
| Spec | Dreame - X40 Ultra | iRobot - Roomba Combo 10 Max |
|---|---|---|
| Lidar | truelead | false |
| Camera navigation | true | true |
| AI obstacle avoidance | true | true |
| Max climb | 60 mmlead | 20 mm |
Autonomy
| Spec | Dreame - X40 Ultra | iRobot - Roomba Combo 10 Max |
|---|---|---|
| Battery life | 210 minlead | 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, X40 Ultra or Roomba Combo 10 Max?+
X40 Ultra delivers 12000 Pa vs Pa.
Do X40 Ultra or Roomba Combo 10 Max mop?+
Both can mop.
Which has a self-emptying base, X40 Ultra or Roomba Combo 10 Max?+
Both ship with a self-emptying base.