Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Dreame - X40 Ultra | Roborock - Qrevo Master |
|---|---|---|
| Suction | 12000 Pa | 10000 Pa |
| Battery life | 210 min | 180 min |
| Water tank | 270 ml | 250 ml |
| Noise | 65 dB | 64 dB |
Between the X40 Ultra and Qrevo Master, the X40 Ultra comes out ahead in suction / battery life, while the Qrevo Master wins on noise. Overall, the X40 Ultra scores 83.9 and the Qrevo Master scores 81.3 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (83.9 vs 81.3). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the X40 Ultra if you care most about suction / battery life. The biggest gaps in its favor are suction, battery life, water tank. The single most decisive one: Suction — 20.00% more. 12000 Pa vs 10000 Pa.
Pick the Qrevo Master if you care most about noise. Its strongest claims are noise. The single most decisive one: Noise — 1.00 dB less. 64 vs 65.
Both ship with comparable mopping, lidar, self-empty base, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Dreame - X40 Ultra or Roborock - Qrevo Master?
Dreame - X40 Ultra leads the current Mars Score by 2.6 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 suction pa, battery life min, water tank capacity ml.
Choose Roborock - Qrevo Master if…
Roborock - Qrevo Master has the measurable edge on noise db.
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
- ▲Suction — 20.00% more. 12000 Pa vs 10000 Pa.
- ▲Battery life — 16.67% more. 210 min vs 180 min.
- ▲Water tank — 8.00% more. 270 ml vs 250 ml.
Why Roborock - Qrevo Master wins
- ▲Noise — 1.00 dB less. 64 vs 65.
Spec comparison
Cleaning
| Spec | Dreame - X40 Ultra | Roborock - Qrevo Master |
|---|---|---|
| Suction | 12000 Palead | 10000 Pa |
| Mopping | true | true |
| Water tank | 270 mllead | 250 ml |
| Dustbin | 350 mllead | 300 ml |
| Carpet detection | true | true |
Navigation
| Spec | Dreame - X40 Ultra | Roborock - Qrevo Master |
|---|---|---|
| Lidar | true | true |
| Camera navigation | true | true |
| AI obstacle avoidance | true | true |
| Max climb | 60 mmlead | 25 mm |
Autonomy
| Spec | Dreame - X40 Ultra | Roborock - Qrevo Master |
|---|---|---|
| Battery life | 210 minlead | 180 min |
| Self-empty base | true | true |
| Self-wash mop | true | true |
| Self-dry mop | true | true |
| Noise | 65 dB | 64 dBlead |
Frequently asked
Which has stronger suction, X40 Ultra or Qrevo Master?+
X40 Ultra delivers 12000 Pa vs 10000 Pa.
Do X40 Ultra or Qrevo Master mop?+
Both can mop.
Which has a self-emptying base, X40 Ultra or Qrevo Master?+
Both ship with a self-emptying base.