Best Robot Vacuums is reader-supported. When you buy through links on our site, we may earn a commission. Details.
We may earn a commission when you buy through links on this page. Learn more.
Dreame X40 Ultra vs iRobot Roomba j7+
The Dreame X40 Ultra wins with a score of 8.4/10. Best for: Mid-to-large hard-floor homes wanting flagship mopping at a discount.
Winner
Dreame X40 Ultra
8.4/10$900
Last-gen flagship with class-leading mopping, now half its launch price.
Read full reviewiRobot Roomba j7+
0.0/10$399
Score Comparison
Dreame X40 UltraiRobot Roomba j7+
Overall
8.4—
Hard Floor
9.2—
Carpet
8.5—
Mopping
9.4—
Navigation
8.6—
Noise
7.5—
Smart Features
8.3—
Maintenance
7.8—
Specifications
| Dreame X40 Ultra | Spec | iRobot Roomba j7+ |
|---|---|---|
| $900 | Price | $399 |
| 12000 | Suction (Pa) | — |
| 6400 | Battery (mAh) | — |
| 65.0 | Noise (dB) | — |
| — | Dustbin (ml) | — |
| — | Water Tank (ml) | — |
| — | Mop Lift (mm) | — |
| — | Height (mm) | — |
| — | Weight (kg) | — |
| LiDAR + 3D Structured Light | Navigation | vSLAM Camera |
| ✅ | Self-Empty | ✅ |
| ✅ | Self-Wash Mop | ❌ |
| ✅ | Self-Dry Mop | ❌ |
| ✅ | AI Obstacle | ✅ |
The Verdict
The Dreame X40 Ultra is the better choice with an overall score of 8.4/10 — best for mid-to-large hard-floor homes wanting flagship mopping at a discount. The iRobot Roomba j7+ is more affordable at $399 vs $900.