Introduction
Choosing between the Dreame L40 Ultra AE, the Roborock Qrevo Edge S5A and the Roborock Qrevo Slim requires analysing what each user is really looking for. The Dreame model arrives in 2025 as an ambitious proposition with high-end features, whilst the two Roborock units represent 2024 options with different approaches: the Qrevo Edge S5A focuses on corner sweeping efficiency, and the Qrevo Slim stands out for its compact design capable of slipping under low furniture.
All three integrate a multifunction base with mop washing and drying, which guarantees quality mopping. However, differences in suction power, navigation systems and storage capacities mark clearly differentiated usage profiles.
Power and Suction
The difference in suction power is significant. The Dreame L40 Ultra AE reaches 19,000 Pa, slightly exceeding the 18,500 Pa of the Roborock Qrevo Edge S5A. The Qrevo Slim remains at 11,000 Pa, a figure that may be tight for thick carpets or ingrained dirt, although sufficient for daily maintenance on hard floors.
As for main brushes, each manufacturer opts for its anti-tangle technology. The Dreame mounts the TriCut 3.0, which combines bristles with blades to cut hair. The Qrevo Edge S5A equips the DuoDivide Antienredos system, designed to push hair towards the central suction gap. The Qrevo Slim uses a double brush with a similar approach.
The liftable main brush appears on the Dreame and the Qrevo Slim, allowing it to lift during mopping to avoid dragging wet dirt. The Qrevo Edge S5A does not have this function. For corner sweeping, the Qrevo Edge S5A and the Qrevo Slim incorporate an extendable side brush, which deploys to better reach corners. The Dreame does without this feature. Additionally, only the Qrevo Edge S5A includes an anti-tangle side brush, a useful detail if you live with long-haired pets.
Mopping
All three robots mop with two rotating mops and extend them towards the edges. The Dreame adds the Roboswing system, a swinging movement that allows the mop to slightly reach under furniture or protrusions. The Roborock models do not integrate this function.
Mop lifting reaches 10.5 mm on the Dreame L40 Ultra AE, compared to 10 mm on the Qrevo Edge S5A and the Qrevo Slim. Minimal difference in practice, but it can make a difference on medium-pile carpets. All three mop with cold water, without water heating for floor mopping.
The bases wash the mops with hot water in all three cases and dry them with hot air, preventing bad odours. Self-cleaning of the washing tray varies: the Dreame boasts an improved second generation, the Qrevo Edge S5A mounts version 2.0, and the Qrevo Slim equips the 1.0. In practice, this translates to greater maintenance autonomy for the first two.
All detect dirt both on the mops and on the floor, automatically adjusting washing or scrubbing as necessary. None automatically removes the mops at the base to perform vacuuming only.
Navigation System
Important differences appear here. The Dreame L40 Ultra AE and the Roborock Qrevo Edge S5A mount a traditional LiDAR turret, whilst the Qrevo Slim uses the StarSight 1.0 system, also laser-based but with a different design.
The Qrevo Edge S5A is left without AI camera and without front 3D laser sensor, which limits its object recognition capability. The Dreame recognises up to 120 different obstacles, the Qrevo Slim identifies 73, but this figure is not specified for the Edge S5A, probably because its avoidance system is more basic.
Only the Dreame and the Qrevo Slim specifically recognise pets, allowing them to be avoided or photographed. Both also offer remote camera access and night vision LED, functions absent in the Qrevo Edge S5A. This can be interesting if you want to monitor your home whilst the robot cleans or simply see what your dog is doing.
All three integrate intelligent AI cleaning: CleanGenius on the Dreame and SmartPlan on the Roborock. The RR Mason 11.0 processor equips the Roborock models; the specific CPU is not detailed for the Dreame.
Autonomy and Battery
Battery capacity is identical: 5,200 mAh in all three robots. The Roborock models declare 180 minutes of autonomy, sufficient for homes of up to 200-250 m² in a single cycle. This data is not specified for the Dreame, although with the same battery capacity similar performance is expected.
The higher suction power of the Dreame and the Qrevo Edge S5A may consume slightly more energy in maximum mode, slightly reducing autonomy compared to the Qrevo Slim. In practice, all three should complete cleaning in medium-sized homes without problems.
Smart Functions
All three overcome obstacles up to 20 mm in height, allowing them to pass over carpets, thresholds or small uneven surfaces without getting stuck. None mounts a robotic arm, a function reserved for higher-end models.
The Roborock Qrevo Slim integrates its own voice assistant, allowing you to give it commands directly without going through the app or external speakers. The Dreame and the Qrevo Edge S5A lack this function, although all three are compatible with Alexa and Google Home for control via external assistants.
Multifunction Cleaning Base
All three bases auto-empty the dust container, wash the mops with hot water and dry them with hot air. Differences appear in storage capacities.
The Dreame L40 Ultra AE equips a 3.2-litre dust bag, 4.5-litre clean water tank and 4-litre dirty water tank. The Roborock mount a 2.7-litre bag, 4 litres of clean water and 3.5 litres of dirty water. Greater capacity means fewer trips to the tap to refill or empty, especially relevant in large homes or with frequent mopping.
Only the Dreame includes a detergent tank in the base, dispensing it automatically during mop washing. The Roborock require adding product manually to the water if you want to use it. Additionally, the Dreame offers an optional kit for plumbing connection, although it is purchased separately. The Roborock models do not have this option.
Dimensions
Diameter varies minimally: 350 mm for the Dreame, 352 mm for the Qrevo Edge S5A and 353 mm for the Qrevo Slim. Height marks the big difference: the Qrevo Slim measures only 82 mm, compared to 97 mm for the Dreame and 98 mm for the Qrevo Edge S5A. Those 15-16 mm can decide whether the robot fits or not under sofas, beds or low furniture.
The bases have an identical width of 340 mm. Height varies: 590.5 mm for the Dreame, 521 mm for the Roborock. Depth also differs: 456.7 mm for the Dreame compared to 487 mm for the Roborock. The Dreame base occupies slightly more height but less depth, whilst the Roborock are lower but protrude more forwards. It is advisable to measure the available space before deciding.
Real-world experience
For large homes, the Dreame L40 Ultra AE offers clear advantages: greater capacity in all base tanks, which reduces manual interventions. Its 19,000 Pa power and automatic detergent dispenser facilitate maintenance in large spaces. The optional plumbing connection kit may be of interest if you seek maximum autonomy, although it requires additional installation.
The Roborock Qrevo Edge S5A stands out for its extendable and anti-tangle side brush, ideal for corners and homes with pets. Its navigation without AI camera is more basic, but sufficient if you do not need surveillance functions or advanced object recognition. The relationship between power and price can be attractive.
The Qrevo Slim shines in homes with low furniture. Its 82 mm height allows it to clean under sofas, beds or wardrobes where the others cannot access. The dual AI camera, pet recognition and built-in voice assistant add convenience. The 11,000 Pa power may fall short on thick carpets or if you have pets that shed a lot of hair, but it works well on hard floors and regular maintenance.
All three robots wash and dry mops with hot water and air, guaranteeing good mopping results. Dirt detection automatically adjusts intensity. For pets, the Dreame and the Qrevo Slim offer specific recognition and camera access, useful for locating or avoiding them during cleaning.
Conclusion: Which to choose?
Choose the Dreame L40 Ultra AE if you seek maximum autonomy in large homes. Its larger tanks, automatic detergent dispenser and plumbing connection option minimise maintenance. The 19,000 Pa power and liftable brush guarantee good results in vacuuming and mopping. Ideal if you prioritise storage capacity and do not mind doing without the extendable side brush.
Choose the Roborock Qrevo Edge S5A if you value corner sweeping and have pets. Its extendable and anti-tangle side brush improves cleaning in corners and reduces hair tangles. The 18,500 Pa power is sufficient for most situations. A wise choice if you do not need AI camera or surveillance functions, prioritising sweeping efficiency over advanced navigation.
Choose the Roborock Qrevo Slim if you have low furniture and want the robot to clean underneath. Its 82 mm height makes the difference on sofas, beds or wardrobes with little separation from the floor. The dual AI camera, pet recognition and built-in voice assistant add functionality. Suitable for medium-sized homes with hard floors or thin carpets, where the 11,000 Pa power is sufficient for day-to-day use.
