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Introduction
The Dreame L40s Pro Ultra, the Roborock Qrevo Curv 2 Pro and the Roborock Saros 10R represent three high-end propositions launched in 2025 that incorporate a complete multifunction base. All three units integrate advanced navigation systems with dual AI camera, hot water mop washing and hot air drying, as well as the ability to overcome double-step obstacles.
Although they share many functions, there are notable differences in suction power, battery life, main brush design and base configuration. The Dreame model opts for a dual HyperStream brush system and greater capacity in the water tanks, whilst the two Roborock units stand out for their retractable LiDAR and greater suction power in the case of the Qrevo Curv 2 Pro. The Saros 10R incorporates mopping with warm water, a unique feature amongst the three.
Power and Suction
The Roborock Qrevo Curv 2 Pro leads this section with 25,000 Pa of suction power, a figure that clearly exceeds the Dreame L40s Pro Ultra's 19,000 Pa and the Roborock Saros 10R's 18,500 Pa. This difference can be particularly noticeable on high-pile carpets or in homes with pets that shed a lot of hair.
Regarding the main brushing system, the Dreame opts for a dual anti-tangle HyperStream brush, whilst the two Roborock models incorporate the anti-tangle DuoDivide system. Both technologies are designed to minimise hair tangles, albeit with different approaches: the HyperStream uses two brushes anchored at one end, whilst the DuoDivide pushes hairs towards the central gap for direct suction.
All three robots raise the main brush during mopping to prevent it from getting wet. The side brush is extendable in all cases to improve corner cleaning, and also features anti-tangle technology. However, the liftable side brush is only present on the Dreame L40s Pro Ultra and the Roborock Saros 10R, not on the Qrevo Curv 2 Pro. This allows these two models to lift the side brush when mopping, preventing it from dispersing dirty water.
Mopping
The mopping system is one of the strong points of all three units. The Dreame L40s Pro Ultra uses two rotating mops at 180 RPM, whilst the two Roborock models go up to 200 RPM. The Qrevo Curv 2 Pro also adds 12N of pressure on the mops, a specification not provided for the other two models.
Mop extension is present on all three robots, although with an important nuance: the Dreame incorporates the RoboSwing system, which adds a swinging movement to get the mop under furniture or ledges. The two Roborock models have lateral mop extension, but without that additional movement.
Mop lifting varies notably. The Dreame reaches 10.5 mm, the Qrevo Curv 2 Pro between 7 and 17 mm, and the Saros 10R between 12 and 22 mm. This last figure is especially useful for thick carpets, as it ensures that the mops don't touch the textile surface during vacuuming.
A relevant difference appears in the mopping water temperature: the Roborock Saros 10R mops with warm water, whilst the Dreame L40s Pro Ultra and the Qrevo Curv 2 Pro use cold water. This can improve the dissolution of greasy stains in the case of the Saros 10R.
All three units detect dirt both on the mops and on the floor, and can remove the mops at the base to perform vacuuming only when necessary.
Navigation System
The Dreame L40s Pro Ultra features a traditional 360° LiDAR turret, whilst the two Roborock models incorporate retractable 360° LiDAR. In the case of the Saros 10R, the system is called StarSight 2.0. The retractable LiDAR allows the robot height to be reduced to 79.8 mm on both Roborock models, compared to the Dreame's 103.8 mm. In practice, this makes it easier for the Roborock units to access under low furniture where the Dreame cannot enter.
All three models integrate dual AI camera and front 3D laser sensor to avoid obstacles. The number of recognised objects varies: 200 on the Qrevo Curv 2 Pro, 180 on the Dreame and 108 on the Saros 10R. All recognise pets and feature LED for night vision, as well as remote camera access.
Only the Dreame L40s Pro Ultra includes curtain detection, a function that doesn't appear on either of the two Roborock models. This allows the Dreame robot to identify curtains and adjust its behaviour to avoid getting tangled.
Regarding AI-based intelligent cleaning, the Dreame uses CleanGenius 2.0, the Qrevo Curv 2 Pro employs SmartPlan 3.0 and the Saros 10R uses SmartPlan 2.0 together with the RR Mason 11.0 algorithm. All three recognise stains using AI to intensify cleaning in those areas.
Battery Life and Battery
The Roborock Qrevo Curv 2 Pro's battery offers 6,400 mAh, the same as the Saros 10R, whilst the Dreame L40s Pro Ultra has 5,200 mAh. This difference translates into actual battery life: the Qrevo Curv 2 Pro reaches 290 minutes, the Dreame 220 minutes and the Saros 10R 180 minutes.
It's striking that, despite having the same battery capacity as the Qrevo Curv 2 Pro, the Saros 10R offers less battery life. This may be due to the additional consumption of the warm water system for mopping or to differences in the energy management of the StarSight 2.0 system.
For large homes, the Qrevo Curv 2 Pro presents a clear advantage thanks to its almost five hours of battery life. The Dreame sits at a middle ground suitable for surfaces of up to 200-250 m², whilst the Saros 10R may require intermediate recharging in very large houses.
Smart Functions
The ability to overcome obstacles shows interesting differences. The Dreame L40s Pro Ultra can cross single steps of up to 22 mm and double steps of 40 mm. The two Roborock models improve on these figures: single step of 30 mm and double step of 40 mm in both cases. These additional 8 mm on single steps can make the difference with certain types of transitions between floors or thick carpets.
All three robots incorporate their own voice assistant and are compatible with external assistants such as Alexa or Google Home. None of the three includes a robotic arm.
Multifunction Cleaning Base
All three bases perform auto-emptying of the dust bin, hot water mop washing and hot air drying. The differences appear in the temperatures: the Dreame washes at 75°C and dries at 45°C, the Qrevo Curv 2 Pro washes at 100°C and dries at 55°C, and the Saros 10R washes at 80°C and dries at 45°C. The Qrevo Curv 2 Pro's 100°C water offers better mop disinfection.
Self-cleaning of the washing tray is present on all three, although with different versions: third generation on the Dreame, version 3.0 on the Qrevo Curv 2 Pro and version 2.0 on the Saros 10R.
The detergent tank appears on the Dreame L40s Pro Ultra and on the Saros 10R, but not on the Qrevo Curv 2 Pro. This allows the first two to automatically dispense cleaning product during mop washing.
In terms of capacities, the Dreame stands out with a 3.2-litre dust bag, 4.5-litre clean water tank and 4-litre dirty water tank. The two Roborock models have a 2.5-litre bag, 4-litre clean water tank and 3-litre dirty water tank. For large homes or those with several pets, the Dreame's larger tanks reduce maintenance frequency.
Only the Dreame L40s Pro Ultra offers a plumbing connection kit, although it's purchased separately. None of the three includes integrated plumbing connection.
Dimensions
The diameter is very similar on all three: 350 mm on the Dreame, 352 mm on the Qrevo Curv 2 Pro and 353 mm on the Saros 10R. The real difference is in the height: 103.8 mm on the Dreame versus 79.8 mm on the two Roborock models. These additional 24 mm on the Dreame limit its ability to access under sofas, beds or low furniture.
The bases also differ in size. The Dreame measures 340 mm wide, 590.5 mm high and 456.7 mm deep. The Qrevo Curv 2 Pro forms a cube of 450 mm in all three dimensions. The Saros 10R is 381 mm wide, 488 mm high and 475 mm deep. The most compact base in height is the Saros 10R's, whilst the Dreame's is narrower but also taller.
Real-World User Experience
For large homes, the Roborock Qrevo Curv 2 Pro offers the best combination of battery life and power. Its 290 minutes of operation and 25,000 Pa allow it to clean large surfaces without the need for intermediate recharges. The Dreame L40s Pro Ultra compensates for its lower battery life with higher capacity tanks in the base, which reduces the frequency of dust emptying and water refilling.
In homes with pets, all three robots incorporate anti-tangle brushes. The Dreame's HyperStream system and the Roborock's DuoDivide are specifically designed to minimise hair tangles. The Qrevo Curv 2 Pro's greater suction power can be advantageous with hair embedded in carpets.
If the home has a lot of low furniture, the two Roborock models win on height. Their 79.8 mm allows them to access spaces where the Dreame, at 103.8 mm, cannot enter. This can be decisive depending on the furniture configuration.
For those seeking the best mopping, the Roborock Saros 10R provides warm water for floor mopping, as well as the greatest mop lifting (up to 22 mm). The Qrevo Curv 2 Pro stands out for washing the mops at 100°C and drying them at 55°C, which guarantees better hygiene. The Dreame adds the RoboSwing movement to improve mopping under ledges and features a detergent tank.
The Dreame's curtain detection can be relevant in homes with long curtains that reach the floor. The two Roborock models don't include this function.
Conclusion: Which One to Choose?
Choose the Dreame L40s Pro Ultra if you're looking for the highest capacity tanks in the base (3.2 litres of dust, 4.5 of clean water), you value the RoboSwing system for mopping under furniture, you need curtain detection or you prefer to have an integrated detergent tank. It's also interesting
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