The Dreame X40 Ultra delivers dual spinning mop pads, 12,000 Pa of suction, a bigger dock water supply and a three-year warranty for a fraction of what the Roborock costs. The Roborock S8 MaxV Ultra counters with a dual rubber brush setup, anti-tangle hardware and a 180-minute runtime that covers 3,229 sq ft in a single pass. Households with pets and large floor plans lean Roborock; anyone who mops often and wants stronger value leans Dreame.
A 70% price difference changes how this matchup reads. The Dreame X40 Ultra isn't a budget robot by any stretch, but sitting next to the Roborock S8 MaxV Ultra it looks like a bargain, and it brings real hardware to the fight: dual spinning mop pads, 12,000 Pa suction, a 10 mm liftable side brush and mop pads that detach automatically before the robot rolls onto carpet. Roborock's answer is a dual rubber brush system with anti-tangle design, a longer verified runtime and a broader automation suite. Both use LiDAR plus camera plus 3D structured light for navigation, so the decision comes down to what happens after the mapping is done.
Dreame X40 Ultra
out of 10Roborock S8 MaxV Ultra
Roborock takes the overall rating 8.1 versus 7.6, and most of that comes from two categories. Cleaning lands at 8.1 for the Roborock against 7.2 for the Dreame, driven by the dual rubber brush and anti-tangle design. Features are further apart at 8.6 versus 7.6. The Dreame wins navigation 8.4 to 7.9, helped by its 22 mm obstacle clearance and side brush lifting. So the Roborock is the stronger all-rounder, but the gap isn't uniform across the board.
Start with the brushes. Roborock runs dual rubber brushes with anti-tangle design, which matters a lot if long hair is a daily reality in your home. Dreame uses a single rubber brush but pushes 12,000 Pa against Roborock's 10,000 Pa, plus a slightly larger dustbin and a noticeably bigger dust bag in the dock. Mopping splits differently: Dreame's dual spinning pads actively scrub with pressure, which beats vibrating pads for lifting dried-on messes, and it offers 32 moisture levels against 4. Roborock's vibrating pad lifts 20 mm for carpet clearance versus Dreame's 10.5 mm, though Dreame's pads detach automatically instead. Warranty is three years versus one.
Dreame brings more suction at 12,000 Pa versus 10,000 Pa and a slightly larger 300 mL dustbin, but Roborock's dual rubber brushes with anti-tangle design pick up more consistently across mixed flooring. More suction through one brush doesn't automatically beat two brushes working together.
Dreame's dual spinning mop pads apply real scrubbing pressure, a step above Roborock's vibrating pad and rotating edge pad, and 32 moisture levels give far finer control than 4. Roborock counters with a 4,000 vibrations-per-minute pad, hot air drying at 140 °F and a 20 mm mop lift, though Dreame washes its pads hotter at 158 °F and can detach them automatically before hitting carpet.
Anti-tangle is the deciding factor here, and only the Roborock has it, which means less time cutting hair off a brush roll with scissors. Dreame answers with 12,000 Pa and a larger 3.2 L dust bag, so it holds more between changes even if the brush needs more attention.
Both robots use the same combination of AI, camera and 3D structured light on top of LiDAR mapping, so obstacle recognition is comparable. Dreame edges ahead with 22 mm of obstacle clearance versus 20 mm and a side brush that lifts 10 mm to avoid dragging debris across rugs.
Both docks empty the dustbin and wash the mop pads automatically. Dreame holds more in every reservoir (bigger clean water tank, bigger dirty water tank, bigger dust bag) and washes at 158 °F, while Roborock adds hot air drying at 140 °F to keep pads from going musty.
Roborock is rated for 180 minutes and 3,229 sq ft in a single run, which comfortably covers most homes before a recharge. Dreame carries the larger 6,400 mAh battery against 5,200 mAh, so the raw cell capacity is on its side.
Both handle Amazon Alexa, Google Assistant and Apple, plus no-go zones, multi-level maps, smart carpet cleaning and smart obstacle avoidance. Roborock adds built-in voice control so you can bark a command at the robot itself without opening an app.
| Feature | Dreame X40 Ultra | Roborock S8 MaxV Ultra |
|---|---|---|
| Anti-Tangle | No | Yes |
| Main Brush Type | Single (rubber) | Dual (rubber) |
| Mop Type | Dual spinning mop pads | Vibrating mop pad + rotating edge mop |
| Battery Life | 6,400 mAh | 5,200 mAh |
| Liftable Side Brush | Yes | No |
| Mop Moisture Levels | 32 | 4 |
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Roborock earns its higher rating with dual anti-tangle brushes, longer verified range and a deeper feature set. But the Dreame delivers stronger mopping hardware, more suction, bigger dock tanks and triple the warranty coverage for far less. Pet homes lean Roborock. Everyone else gets remarkable value from the Dreame.
