Between the L40 Ultra and X50 Ultra, the L40 Ultra comes out ahead in several specs, while the X50 Ultra wins on suction and water tank. Overall, the L40 Ultra scores 68.2 and the X50 Ultra scores 84 on our Mars Score.
Which should you buy?
The X50 Ultra is the clear pick on raw spec strength, leading by 15.8 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 L40 Ultra 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 X50 Ultra if you care most about suction and water tank. Its strongest claims are suction, water tank, battery life, among others.
Both ship with comparable mopping, lidar, self-empty base, so those specs don't separate the two — focus on the differences below.
Bottom line: the X50 Ultra is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Dreame - L40 Ultra wins
- No decisive advantages.
Why Dreame - X50 Ultra wins
- ▲Suction — 81.82% more. 20000 Pa vs 11000 Pa.
- ▲Water tank — 7.69% more. 280 ml vs 260 ml.
- ▲Battery life — 5.00% more. 210 min vs 200 min.
- ▲Noise — 2.00 dB less. 63 vs 65.
Spec comparison
Cleaning
| Spec | Dreame - L40 Ultra | Dreame - X50 Ultra |
|---|---|---|
| Suction | 11000 Pa | 20000 Palead |
| Mopping | true | true |
| Water tank | 260 ml | 280 mllead |
| Dustbin | 320 ml | 350 mllead |
| Carpet detection | true | true |
Navigation
| Spec | Dreame - L40 Ultra | Dreame - X50 Ultra |
|---|---|---|
| Lidar | true | true |
| Camera navigation | true | true |
| AI obstacle avoidance | true | true |
| Max climb | 40 mm | 60 mmlead |
Autonomy
| Spec | Dreame - L40 Ultra | Dreame - X50 Ultra |
|---|---|---|
| Battery life | 200 min | 210 minlead |
| Self-empty base | true | true |
| Self-wash mop | true | true |
| Self-dry mop | true | true |
| Noise | 65 dB | 63 dBlead |
Frequently asked
Which has stronger suction, L40 Ultra or X50 Ultra?+
X50 Ultra delivers 20000 Pa vs 11000 Pa.
Do L40 Ultra or X50 Ultra mop?+
Both can mop.
Which has a self-emptying base, L40 Ultra or X50 Ultra?+
Both ship with a self-emptying base.
Spec-level deep dives
More from the same brands
vsMars is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. Learn more.