Side-by-side
Dreame X50 Ultra vs Dreame X40 Ultra
A detailed, spec-by-spec breakdown across 2 robots.
Which should you buy?
Dreame X50 Ultra
Get the X50 Ultra if your home has steps or raised thresholds. Its legs lift it over obstacles the X40 cannot manage, it has almost twice the suction, 20,000 Pa against 12,000, and it sits lower so it fits under more furniture.
Dreame X40 Ultra
Get the X40 Ultra if you have a lot of floor to cover. It is rated for 4,500 sq ft against 4,000 on the same 210 minute battery, and its twin spinning mops actually score higher than the newer robot, 9.7 against 9.4.
Bottom line
The scores are 9.4 and 9.2. The newer robot wins on climbing and suction, not on mopping. If your floors are flat, the X40 is still a lot of robot.
| Spec | ||
|---|---|---|
| Overview | ||
| Overall Score | 9.4 | 9.2 |
| Model Year | 2025 | 2024 |
| Cleaning | ||
| Suction Power | 20000 Pa | 12000 Pa |
| Suction Score | 9.6 | 9.5 |
| Pet Hair Score | 9.5 | 9.4 |
| Brush Type | Anti-Tangle | Anti-Tangle |
| Carpet Boost | ||
| Mopping | ||
| Mop Type | Rotating | Rotating |
| Mopping Score | 9.4 | 9.7 |
| Mop Lift | ||
| Mop Lift Height | 10.5mm | 12mm |
| Base Station | ||
| Auto-Empty | ||
| Auto-Wash Mop | ||
| Hot-Air Dry | ||
| Auto-Refill Mop | ||
| Days Between Empties | 75 days | 75 days |
| Navigation | ||
| Navigation Type | LiDAR + Camera | LiDAR |
| Navigation Score | 9.6 | 9.3 |
| Floors Mapped | 4 | 4 |
| No-Go Zones | ||
| Battery | ||
| Runtime | 210 min | 210 min |
| Coverage Area | 4000 sq ft | 4500 sq ft |
| Design | ||
| Height | 89mm | 98mm |
| Weight | 4.7 kg | 4.65 kg |
| Smart Home | ||
| App Score | 8.9 | 8.8 |
| Voice Assistants | Alexa, Google Assistant | Alexa, Google Assistant |
| Local Control | ||
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