Introduction
The Dreame L40s Pro Ultra, the Mova P50s Ultra and the Roborock Qrevo Slim represent three distinct propositions within the high-end range of robot vacuum cleaners with multifunctional base stations. The first two, launched in 2025, share the dual anti-tangle brush design and RoboSwing technology to extend the mops, whilst the Roborock Qrevo Slim from 2024 stands out for its ultra-low profile of just 82 mm in height. All integrate bases that wash and dry the mops with hot air, albeit with notable differences in capacities, washing temperature and navigation systems.
The Dreame L40s Pro Ultra opts for a classic LiDAR turret with 19,000 Pa of suction, the Mova P50s Ultra impresses with 24,000 Pa and the FlashPulse system without visible turret, and the Roborock Qrevo Slim balances its compact design with 11,000 Pa and StarSight 1.0 navigation. The choice will depend on the type of home, the need to pass under low furniture and preferences regarding suction power or ability to overcome obstacles.
Power and Suction
The most evident difference in suction is marked by the Mova P50s Ultra with its 24,000 Pa, a figure that clearly places it ahead of the Dreame L40s Pro Ultra (19,000 Pa) and well above the Roborock Qrevo Slim (11,000 Pa). In practice, this extra power proves especially useful on medium or long pile carpets, where elevated suction marks the difference between an acceptable result and a deep clean.
All three models lift the main brush during mopping to avoid staining already clean surfaces. However, the type of brush varies: both the Dreame and the Mova use dual anti-tangle brush systems, with the Dreame L40s Pro Ultra's HyperStream model specifically designed to minimise hair tangles. The Roborock Qrevo Slim opts for a dual silicone brush, which also reduces tangles but with a different design approach.
The side brush presents significant differences. The Dreame L40s Pro Ultra and the Mova P50s Ultra incorporate a liftable side brush and anti-tangle technology, which facilitates maintenance and improves corner sweeping without hair accumulation. The Roborock Qrevo Slim lacks these two functions, although it does include the extendable side brush that all three models share to improve access to corners.
Mopping
All three robots mop with two rotating mops, but at different speeds. The Mova P50s Ultra reaches 230 RPM with a pressure of 8N, the Roborock Qrevo Slim spins at 200 RPM and the Dreame L40s Pro Ultra at 180 RPM. This difference in revolutions influences the ability to remove stuck-on stains, although in practice the applied pressure and the mop washing system also play a determining role.
Both the Dreame and the Mova feature the RoboSwing system, which extends the mop performing a lateral movement to better reach edges and under furniture overhangs. The Roborock Qrevo Slim also extends the mops, but without that characteristic movement. Mop lifting is practically identical: 10.5 mm in the Dreame and Mova models, 10 mm in the Roborock.
An exclusive advantage of the Dreame L40s Pro Ultra and the Mova P50s Ultra is the automatic removal of the mops at the base when only vacuuming is desired. The Roborock Qrevo Slim does not offer this function, which requires manual removal of the mops if you want to avoid dragging them dry during vacuum mode. All three models detect dirt both on the mops and on the floor to adjust cleaning.
Navigation System
The Dreame L40s Pro Ultra maintains the traditional 360° LiDAR turret, which provides precision in mapping but adds height to the robot. The Mova P50s Ultra employs the FlashPulse system, which dispenses with a visible turret and contributes to its low profile. The Roborock Qrevo Slim uses StarSight 1.0, also without a prominent turret, which explains its height of only 82 mm.
Obstacle recognition capability varies considerably: the Mova P50s Ultra identifies up to 200 different objects, the Dreame L40s Pro Ultra recognises 180 and the Roborock Qrevo Slim remains at 73. All integrate dual AI camera, front 3D laser sensor and LED for night vision, as well as allowing remote access to the camera from the app.
The Dreame and the Mova detect curtains to avoid tangles, a function that the Roborock Qrevo Slim does not include. Regarding artificial intelligence, the first two use CleanGenius 2.0, whilst the Roborock employs SmartPlan 1.0. AI stain recognition is present in the Dreame L40s Pro Ultra and the Mova P50s Ultra, but not in the Roborock Qrevo Slim.
Autonomy and Battery
The Mova P50s Ultra stands out with a 6,400 mAh battery, superior to the 5,200 mAh shared by the Dreame L40s Pro Ultra and the Roborock Qrevo Slim. This greater capacity can translate into longer cleaning sessions without needing to recharge, especially useful in large homes or when combining vacuuming and mopping in a single pass.
The Dreame L40s Pro Ultra offers 220 minutes of declared autonomy, whilst the Roborock Qrevo Slim reaches 180 minutes. The Mova P50s Ultra does not specify this data in the table, although its higher capacity battery suggests prolonged performance. In practice, real autonomy depends on the mode of use: vacuuming at maximum power or mopping significantly reduces times compared to eco mode.
Smart Functions
The ability to overcome thresholds marks a notable difference between the three models. The Mova P50s Ultra can overcome single thresholds of up to 42 mm and double ones of 60 mm, figures far superior to the 22 mm single and 40 mm double of the Dreame L40s Pro Ultra. The Roborock Qrevo Slim is limited to 20 mm, typical in low-profile robots where the priority is to pass under furniture rather than climb obstacles.
All three robots integrate their own voice assistant and compatibility with Alexa and Google Home. None incorporates a robotic arm, a function that remains exclusive to very specific models on the market.
Multifunctional Cleaning Base
All three bases perform auto-emptying of the dust container, mop washing with hot water and drying with hot air at 45°C. The differences lie in the details: the Mova P50s Ultra washes the mops at 80°C, the Dreame L40s Pro Ultra at 75°C and the Roborock Qrevo Slim at 60°C. Higher temperatures help to better eliminate grease and disinfect the mops during the washing process.
The Mova P50s Ultra is the only one that includes UV disinfection in the base, an extra for those seeking maximum hygiene. Both the Dreame and the Mova have a detergent tank to add cleaning product during mop washing, a function that the Roborock Qrevo Slim does not offer.
Self-cleaning of the washing tray is third generation in the Dreame L40s Pro Ultra and the Mova P50s Ultra, whilst the Roborock Qrevo Slim uses version 1.0. This influences the frequency with which the base needs to be manually cleaned. The dust bag has 3.2 litres in the Dreame and Mova models, versus 2.7 litres in the Roborock.
Regarding water tanks, the Dreame L40s Pro Ultra has 4.5 litres of clean water and 4 litres of dirty water, the Mova P50s Ultra with 4 and 3.5 litres respectively, and the Roborock Qrevo Slim with 4 and 3.5 litres. The Dreame offers a plumbing connection kit that is purchased separately, an option that is not available in the other two models.
Dimensions
The robot's height is the most relevant dimensional factor. The Roborock Qrevo Slim, at 82 mm, and the Mova P50s Ultra, at 82.5 mm, can slip under furniture where the Dreame L40s Pro Ultra (103.8 mm) cannot reach. This difference of more than 20 mm proves determining in homes with low sofas, beds without tall legs or kitchen furniture with little separation from the floor.
The diameter is similar in all three: 350 mm in Dreame and Mova, 353 mm in Roborock. The robot's dust container reaches 300 ml in the first two, versus 220 ml in the Roborock. The robot's water tank is 80 ml in Dreame and Mova, 72 ml in Roborock.
The bases also differ in size. The Mova P50s Ultra's is the widest (420 mm) but the least tall (470 mm), whilst the Dreame L40s Pro Ultra's measures 340 mm wide and 590.5 mm tall. The Roborock Qrevo Slim's base has intermediate dimensions: 340 mm wide, 521 mm tall and 487 mm deep.
Real-world experience
For large homes, the Mova P50s Ultra provides the combination of greater battery, greater suction power and superior ability to overcome obstacles. Its low profile allows it to access under almost any furniture, and UV disinfection adds a hygiene bonus. The Dreame L40s Pro Ultra proves balanced in autonomy (220 minutes) and cleaning capabilities, although its greater height limits access under low furniture.
In homes with pets, the anti-tangle brush systems of the Dreame and the Mova, together with their also anti-tangle and liftable side brushes, reduce maintenance. The Roborock Qrevo Slim, with its silicone brush, also minimises tangles, but lacks an anti-tangle side brush. The 24,000 Pa power of the Mova proves especially effective for picking up hair embedded in carpets.
If the priority is to pass under furniture, the Roborock Qrevo Slim and the Mova P50s Ultra are the clear options. The former sacrifices some power (11,000 Pa) and climbing ability (20 mm), but accesses spaces that other robots cannot reach. The latter combines low profile with high-end features, although its base is the widest of the three.
For those who value mopping, the Mova P50s Ultra offers 230 RPM, mop washing at 80°C and UV disinfection. The Dreame L40s Pro Ultra provides more generous water tanks (4.5 litres of clean water) and the option of a plumbing connection kit. The Roborock Qrevo Slim washes the mops at 60°C and does not include a detergent tank, but its mopping system remains effective for daily maintenance.
Conclusion: Which to choose?
Choose the Dreame L40s Pro Ultra if you seek a balance between features and advanced functionalities
