Introduction
The Dreame L40s Pro Ultra, the Mova E40 Ultra and the Roborock Qrevo Slim represent three robot vacuum cleaner propositions with multifunctional base launched between 2024 and 2025. The first two share a manufacturer —Dreame is Mova's parent company— and present very similar technical specifications in several aspects, whilst the Roborock Qrevo Slim differs especially in its compact design and its focus on advanced navigation. We are looking at equipment designed for homes seeking complete automation of mopping and vacuuming, with capacity to manage large spaces without constant manual intervention.
The main visible difference lies in suction power and in how each manufacturer has configured its brushing and navigation systems. Whilst the Dreame L40s Pro Ultra opts for maximum power and advanced functions, the Mova E40 Ultra simplifies some features whilst maintaining robust performance. The Roborock Qrevo Slim, on the other hand, stands out for its reduced height and its StarSight 1.0 navigation system, designed to access under low furniture.
Power and Suction
The Dreame L40s Pro Ultra and the Mova E40 Ultra share a suction power of 19,000 Pa, practically double the 11,000 Pa offered by the Roborock Qrevo Slim. This difference is particularly noticeable on thick carpets or when there is significant dirt accumulation. For homes with pets or long-pile carpets, the 19,000 Pa mark a clear advantage.
Regarding the brushing system, the Dreame L40s Pro Ultra and the Roborock Qrevo Slim feature dual HyperStream brush, designed to minimise hair tangles by having two brushes anchored at one end. The Mova E40 Ultra, on the other hand, uses a single brush. This configuration may be less efficient in homes with long-haired pets, although it remains functional.
The liftable main brush during mopping is present in the Dreame L40s Pro Ultra and in the Roborock Qrevo Slim, but not in the Mova E40 Ultra. This allows the first two to avoid wetting the brush when mopping, optimising the mixed cleaning process.
The extendable side brush appears in the Dreame L40s Pro Ultra and in the Roborock Qrevo Slim, improving sweeping in corners. The Mova E40 Ultra lacks this function. Even more notable: only the Dreame L40s Pro Ultra lifts the side brush during mopping, preventing it from interfering with the mops. The anti-tangle side brush is present in Dreame and Mova, but not in Roborock.
Mopping
All three models use two rotating mops and feature edge extension, which allows reaching skirting boards and corners with greater precision. The Dreame L40s Pro Ultra and the Mova E40 Ultra also include the Roboswing system, which performs a lateral movement to get the mops under furniture or protrusions.
Mop lifting is similar: 10.5 mm in Dreame and Mova, 10 mm in Roborock. Sufficient to overcome medium-thickness carpets without dragging wet mops over them.
A function exclusive to the Dreame L40s Pro Ultra is automatic mop removal at the base, allowing the robot to vacuum without wearing the mops. This is practical when only sweeping and vacuuming is needed without mopping, preventing the mops from accumulating dust unnecessarily.
Dirt detection on mops and on the floor is present in the Dreame L40s Pro Ultra and in the Roborock Qrevo Slim, but not in the Mova E40 Ultra. This function allows the robot to identify dirtier areas and reinforce cleaning in those areas, going over them again if necessary.
The bases of all three models wash the mops with hot water and dry them with hot air, guaranteeing hygiene and preventing bad odours. Washing tray self-cleaning reaches its third generation in the Dreame L40s Pro Ultra, first generation in the Roborock Qrevo Slim, and is absent in the Mova E40 Ultra. This means the Dreame requires less manual intervention to keep the tray clean.
Navigation System
The Dreame L40s Pro Ultra and the Mova E40 Ultra feature LiDAR turret, whilst the Roborock Qrevo Slim uses the StarSight 1.0 system. All three include front 3D laser sensor to avoid obstacles at ground level.
The dual AI camera is present in the Dreame L40s Pro Ultra and in the Roborock Qrevo Slim, but not in the Mova E40 Ultra. This camera allows recognising objects with greater precision. The Dreame recognises up to 180 types of obstacles, the Roborock 73. The Mova does not specify this data, which suggests more limited capabilities.
Remote camera access is available in Dreame and Roborock, allowing home monitoring from the app. The Mova E40 Ultra does not offer this function. The night vision LED is also present in Dreame and Roborock, absent in Mova.
Curtain detection is exclusive to the Dreame L40s Pro Ultra, preventing the robot from getting tangled in long curtains or tablecloths. All three models recognise pets, useful for avoiding accidents with domestic animals.
AI stain recognition is only present in the Dreame L40s Pro Ultra, allowing identification of specific stains on the floor and reinforcing mopping in those areas.
Autonomy and Battery
All three units feature 5,200 mAh batteries, but autonomy varies. The Dreame L40s Pro Ultra reaches 220 minutes, the Mova E40 Ultra 210 minutes and the Roborock Qrevo Slim 180 minutes. The difference may be due to energy management and suction power: the Roborock's 11,000 Pa consume less than the 19,000 Pa of Dreame and Mova.
For large homes, the Dreame L40s Pro Ultra's 220 minutes offer greater margin before returning to the base. In practice, this translates into fewer interruptions during cleaning of large spaces.
Smart Functions
Obstacle-crossing capacity is 20 mm in Mova E40 Ultra and Roborock Qrevo Slim. The Dreame L40s Pro Ultra specifies that it can overcome simple steps, although it does not detail the exact height. The 20 mm allow navigating thick cables, medium-thickness carpets or small level differences between rooms.
The own voice assistant is present in the Dreame L40s Pro Ultra and in the Roborock Qrevo Slim, but not in the Mova E40 Ultra. All three are compatible with Alexa and Google Home.
Multifunctional Cleaning Base
All three bases perform auto-emptying of the dust container, mop washing with hot water and drying with hot air. The dust bag capacity is 3.2 litres in Dreame and Mova, 2.7 litres in Roborock. A larger bag reduces replacement frequency.
The clean water tanks are 4.5 litres in Dreame and Mova, 4 litres in Roborock. The dirty water tanks are 4 litres in Dreame and Mova, 3.5 litres in Roborock. In large homes, the larger tanks of the Dreame and Mova allow mopping more surface area without refilling.
The detergent tank is included in the Dreame L40s Pro Ultra, is optional (purchased separately) in the Mova E40 Ultra and is not available in the Roborock Qrevo Slim. This facilitates the use of cleaning product during mop washing in the Dreame without needing to add it manually.
The plumbing connection kit can be purchased for the Dreame L40s Pro Ultra, but is not available for Mova or Roborock. This accessory allows connecting the base to the water and drainage network, eliminating the need to refill and empty tanks. However, as it is sold separately, it should not be considered a decisive advantage in the comparison.
Dimensions
Robot height is the most differentiating factor. The Roborock Qrevo Slim measures 82 mm, the Mova E40 Ultra 97 mm and the Dreame L40s Pro Ultra 103.8 mm. For low furniture, sofas or beds with little clearance, the Roborock has a clear advantage. The difference between 82 mm and 103.8 mm can determine whether the robot accesses under certain furniture or not.
The diameter is similar in all three: 350 mm in Dreame and Mova, 353 mm in Roborock. The bases have similar measurements in width (340 mm in all three), but vary in height and depth. The Dreame and Mova base measures 590.5 mm high and 456.7 mm deep, whilst the Roborock's measures 521 mm high and 487 mm deep. The Roborock base is lower but deeper.
Real-world usage experience
In large homes, the Dreame L40s Pro Ultra offers greater autonomy (220 minutes), larger tanks and advanced functions such as automatic mop removal and third-generation tray self-cleaning. This reduces manual maintenance.
For homes with pets, the 19,000 Pa power of the Dreame and Mova, together with the Dreame's dual HyperStream brush, facilitates hair collection. The Roborock, with 11,000 Pa and dual HyperStream brush, is also effective, although less powerful.
In homes with low furniture, the Roborock Qrevo Slim is the most suitable option thanks to its 82 mm height. It accesses spaces where the other two cannot reach.
The Mova E40 Ultra is a simpler alternative, without dual AI camera or tray self-cleaning, but maintains the 19,000 Pa power and the mopping system with rotating mops. It is suitable for those seeking power without needing advanced navigation functions.
Conclusion: Which to choose?
Choose the Dreame L40s Pro Ultra if you seek the maximum level of automation and advanced functions. The third-generation tray self-cleaning, automatic mop removal, dual AI camera with recognition of 180 obstacles, included detergent tank and greater autonomy make it the most complete option. Ideal for large homes with pets and users who prefer to intervene as little as possible.
Choose the Mova E40 Ultra if you want 19,000 Pa power and a robust mopping system without paying for advanced navigation functions or tray self-cleaning. It is a more economical option within the high-end range, suitable for those who do not need remote camera access or curtain recognition, but value suction power and large tanks.
Choose the Roborock Qrevo Slim if the priority is accessing under low furniture. At 82 mm height, it is the most compact of the three. It offers dual AI camera, tray self-cleaning and good navigation with StarSight 1.0, although with lower suction power (11,000 Pa).
