✨ VS Analyses · VacuumSpain comparison technology. Explanation created with AI from verified technical data.
Introduction
The Dreame L40s Pro Ultra and Roborock Qrevo 2 Pro are two high-end robot vacuums with multifunction docks. The Dreame model arrived in 2025, while the Roborock was launched in August 2026. Both are designed for users looking for fully automated home maintenance, with advanced vacuuming and mopping systems that minimise manual intervention.
These robot vacuums are aimed at medium to large homes, particularly those combining hard floors and carpets. Their multifunction docks wash and dry the mop pads using hot water and warm air, providing effective mopping without constant maintenance. The main differences between the two models lie in suction power, visual navigation and several specific mopping features.
Suction Power and Vacuuming
Suction power creates a notable difference between the two models. The Roborock Qrevo 2 Pro offers 25,000 Pa, exceeding the 19,000 Pa of the Dreame L40s Pro Ultra. This advantage provides greater ability to extract embedded dirt from carpets and pick up heavier particles on hard floors.
The main brush systems use different designs. The Dreame features a dual HyperStream anti-tangle brush system, with two rollers anchored at one end to significantly reduce hair tangles. The Roborock uses DuoDivide, which directs hair towards the central opening for easier suction. Both systems are optimised for homes with pets, although they use different approaches.
The Dreame L40s Pro Ultra can lift its main brush while mopping, something the Qrevo 2 Pro does not offer. This prevents the main brush from touching the wet floor and helps avoid dragging damp dirt around. Likewise, the Dreame's side brush lifts during mopping, whereas the Roborock keeps its side brush in place.
For edge cleaning, the Dreame has an extendable side brush designed to reach corners more effectively. Roborock instead uses a reversible side brush that changes its direction of rotation when needed. Both systems aim to improve edge cleaning through different technical approaches.
Mopping
Both robots use two rotating mop pads, with very similar speeds: 180 RPM on the Dreame L40s Pro Ultra and 200 RPM on the Roborock Qrevo 2 Pro. In everyday use, the difference of 20 revolutions per minute is relatively minor.
Both models include mop extension for better edge cleaning. The Dreame adds RoboSwing, which uses a lateral movement to help move the mop underneath furniture and overhangs. The Roborock does not offer this function, although its mop extension still improves coverage along edges.
Mop lift differs between the two models. The Roborock Qrevo 2 Pro raises its mop pads by up to 15 mm, compared with 10.5 mm on the Dreame. This allows the Roborock to cross thicker carpets without wetting them while mopping.
An important difference is the temperature of the water used on the floor. The Dreame L40s Pro Ultra mops using cold water, whereas the Roborock Qrevo 2 Pro uses warm water. Warm water can help dissolve grease and stuck-on stains more effectively. Both docks wash the mop pads using 75°C hot water and dry them with 45°C warm air, helping maintain hygiene and prevent unpleasant odours.
The Dreame detects dirt on both the mop pads and the floor. This allows the robot to identify when its mop pads are dirty and return to the dock to wash them, as well as recognise dirty areas on the floor and clean them more thoroughly. The Roborock Qrevo 2 Pro does not include these detection features.
Navigation System
Both robots use a 360° LiDAR turret to map their surroundings and plan efficient routes. The major difference lies in visual recognition.
The Dreame L40s Pro Ultra uses dual AI cameras capable of recognising up to 180 different types of obstacles. The dual-camera system can identify pets, curtains and other objects more accurately. It also includes a night-vision LED for low-light conditions and remote camera access through the mobile app, allowing you to monitor your home from a distance.
The Roborock Qrevo 2 Pro does not include an AI camera. Instead, it uses a front-facing 3D structured-light laser sensor for obstacle avoidance. This system works well for detecting objects but does not provide visual recognition of pets or curtains, nor does it offer remote camera access. It also lacks a front LED.
For AI-powered cleaning, the Dreame uses CleanGenius 2.0, while the Roborock features SmartPlan 3.0. Both optimise cleaning routes according to floor type and detected dirt levels. The Dreame additionally includes AI stain recognition, something the Qrevo 2 Pro does not offer.
Battery Life and Battery
Both robots have 5,200 mAh batteries, although their claimed runtimes differ slightly. The Roborock Qrevo 2 Pro reaches 253 minutes of continuous operation, while the Dreame L40s Pro Ultra reaches 220 minutes. The 33-minute difference may be relevant in very large homes or complete multi-floor cleaning sessions.
Roborock's longer runtime can partly be explained by the absence of systems that consume additional power, such as the Dreame's dual AI cameras or front LED. In practice, both robots provide enough battery life to clean large areas without requiring intermediate charging.
Smart Features
Threshold-crossing ability also differs. The Dreame L40s Pro Ultra can cross single thresholds up to 22 mm and double thresholds up to 40 mm. The Roborock Qrevo 2 Pro reaches 20 mm. This gives the Dreame greater versatility when dealing with transitions between rooms, raised thresholds or thick carpets.
The Dreame L40s Pro Ultra includes its own built-in voice assistant, allowing the robot to be controlled directly by voice without relying on external assistants. The Roborock Qrevo 2 Pro does not include its own assistant, although both models support Alexa and Google Home.
Multifunction Cleaning Dock
Both docks automatically empty the robot's dustbin, wash the mop pads using 75°C hot water and dry them with 45°C warm air. However, there are differences in capacity and additional features.
The Dreame L40s Pro Ultra has a 3.2-litre dust bag compared with 2.7 litres on the Roborock. Greater capacity means fewer bag changes, which is particularly useful in homes with pets or high levels of daily dirt.
For water capacity, the Dreame provides a 4.5-litre clean-water tank and a 4-litre dirty-water tank. The Roborock has a 4-litre clean-water tank and a 3-litre dirty-water tank. The difference is not dramatic, but the Dreame allows more days of autonomous mopping before the tanks need attention.
Only the Dreame L40s Pro Ultra includes a detergent tank in the dock. This automatically dispenses cleaning solution during mop washing, improving hygiene and mopping results. The Roborock does not offer this feature.
The washing tray system also differs. The Dreame uses a third-generation self-cleaning tray that automatically cleans the area where the mop pads are washed. The Roborock uses a removable tray that must be cleaned manually. This means less maintenance with the Dreame.
Dreame also offers an optional plumbing connection kit, sold separately, allowing the dock to be connected directly to the water supply and drain. Roborock does not offer this option. Although optional, it can be attractive for users seeking maximum automation.
Dimensions
The Roborock Qrevo 2 Pro is 96.6 mm high, while the Dreame L40s Pro Ultra reaches 103.8 mm. This 7.2 mm difference allows the Roborock to clean underneath lower furniture, including certain sofas and beds with limited clearance.
The diameter is almost identical: 350 mm for the Dreame and 352 mm for the Roborock. Both have standard dimensions that make it easy to reach most areas of the home.
The docks differ more noticeably. The Dreame dock measures 340 mm wide, 590.5 mm high and 456.7 mm deep. The Roborock dock measures 402 mm wide, 450 mm high and 494 mm deep. The Dreame dock is taller and narrower, while the Roborock is lower and wider. Available space should therefore be considered before choosing.
Real-world user experience
For homes with pets, the Dreame L40s Pro Ultra offers clear advantages: visual pet recognition, a dual HyperStream anti-tangle brush system and a larger dust bag. Dirt detection on both the mop pads and floor is also useful when pets soil particular areas.
In large homes, the Roborock Qrevo 2 Pro provides longer battery life at 253 minutes and greater suction power at 25,000 Pa. However, the Dreame compensates with larger water tanks and dust bag capacity, reducing maintenance frequency.
For homes with low furniture, the Roborock has an advantage thanks to its lower 96.6 mm height. It can reach underneath more furniture without becoming trapped. At 103.8 mm, the Dreame may be limited in very tight spaces.
Roborock's warm-water mopping is more effective in kitchens with grease or difficult stains. Although the Dreame uses cold water on the floor, it compensates with AI stain recognition and RoboSwing to improve cleaning along edges and underneath overhangs.
Remote monitoring through the Dreame's camera adds value for users who want to keep an eye on their home or pets during the day. The Roborock lacks this feature, although its 3D laser sensor provides strong obstacle avoidance without requiring a camera.
Conclusion: Which one should you choose?
Choose the Dreame L40s Pro Ultra if: you want advanced visual recognition, remote camera access and intelligent dirt detection. It is particularly well suited to homes with pets thanks to its dual AI cameras, pet recognition and larger dust bag. It is also attractive if you value the automatic detergent dispenser, third-generation washing tray self-cleaning and the option of a plumbing connection kit. Its ability to cross thresholds up to 40 mm and its built-in voice assistant add further versatility.
Choose the Roborock Qrevo 2 Pro if: suction power at 25,000 Pa and longer battery life of 253 minutes are your priorities. Its lower 96.6 mm height makes it ideal for homes with low furniture. Warm-water mopping can be more effective on stubborn stains, while the 15 mm mop lift allows it to cross thicker carpets without wetting them. It is a solid option for users looking for a powerful and efficient robot without visual monitoring features, and its lower dock takes up less vertical space.
