Between the X50 Ultra and S9 MaxV Ultra, the X50 Ultra comes out ahead in battery life and noise, while the S9 MaxV Ultra wins on suction and water tank. Overall, the X50 Ultra scores 84 and the S9 MaxV Ultra scores 85.1 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (84 vs 85.1). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
Pick the X50 Ultra if you care most about battery life and noise. The biggest gaps in its favor are battery life, noise.
Pick the S9 MaxV Ultra if you care most about suction and water tank. Its strongest claims are suction, water tank.
Both ship with comparable mopping, lidar, self-empty base, so those specs don't 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 tells you both are well-rounded; the differences are about trade-offs, not quality.
Why Dreame - X50 Ultra wins
- ▲Battery life — 16.67% more. 210 min vs 180 min.
- ▲Noise — 2.00 dB less. 63 vs 65.
Why Roborock - S9 MaxV Ultra wins
- ▲Suction — 10.00% more. 22000 Pa vs 20000 Pa.
- ▲Water tank — 7.14% more. 300 ml vs 280 ml.
Spec comparison
Cleaning
| Spec | Dreame - X50 Ultra | Roborock - S9 MaxV Ultra |
|---|---|---|
| Suction | 20000 Pa | 22000 Palead |
| Mopping | true | true |
| Water tank | 280 ml | 300 mllead |
| Dustbin | 350 ml | 350 ml |
| Carpet detection | true | true |
Navigation
| Spec | Dreame - X50 Ultra | Roborock - S9 MaxV Ultra |
|---|---|---|
| Lidar | true | true |
| Camera navigation | true | true |
| AI obstacle avoidance | true | true |
| Max climb | 60 mmlead | 40 mm |
Autonomy
| Spec | Dreame - X50 Ultra | Roborock - S9 MaxV Ultra |
|---|---|---|
| Battery life | 210 minlead | 180 min |
| Self-empty base | true | true |
| Self-wash mop | true | true |
| Self-dry mop | true | true |
| Noise | 63 dBlead | 65 dB |
Frequently asked
Which has stronger suction, X50 Ultra or S9 MaxV Ultra?+
S9 MaxV Ultra delivers 22000 Pa vs 20000 Pa.
Do X50 Ultra or S9 MaxV Ultra mop?+
Both can mop.
Which has a self-emptying base, X50 Ultra or S9 MaxV Ultra?+
Both ship with a self-emptying base.
Spec-level deep dives
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