Introduction
The Dreame L40s Pro Ultra, the Roborock Qrevo Curv S5X and the Roborock Qrevo Edge S5A represent three high-end propositions launched between 2024 and 2025. All incorporate a complete multifunction base with auto-emptying, mop washing and hot air drying, as well as mopping systems with dual rotating mops. These are devices designed for users seeking maximum automation in the daily maintenance of their homes.
The Dreame model arrives in 2025 with some technological improvements over the two Roborock models from the previous year, especially in terms of artificial intelligence and vision. All three share the same 5,200 mAh battery capacity, but differ in declared autonomy and in various aspects of the brushing and navigation system.
Power and Suction
The Dreame L40s Pro Ultra delivers 19,000 Pa of suction power, slightly exceeding the 18,500 Pa offered by both the Roborock Qrevo Curv S5X and the Qrevo Edge S5A. This 500 Pa difference can be particularly noticeable on medium-pile carpets or when extracting particles embedded in tile joints.
More relevant is the design of the main brush. The Dreame device features a dual HyperStream anti-tangle brush, whilst both Roborock models employ the DuoDivide system, also designed to reduce hair tangles. Both solutions aim to minimise manual maintenance, although they employ different philosophies: the HyperStream uses two brushes anchored at one end, and the DuoDivide pushes hairs towards the central suction gap.
An important functional difference: the Dreame L40s Pro Ultra can raise both the main brush and the side brush during mopping. The two Roborock models do not raise these elements. This means that the Dreame model can perform cleaner mopping without dragging dust residue from the brush onto the wet floor. All three devices feature an extendable, anti-tangle side brush.
Mopping
All incorporate a dual rotating mop system and the ability to extend them towards the edges. However, the Dreame L40s Pro Ultra adds Roboswing movement, a system that allows the robot to make a slight turn to introduce the mop under furniture or overhangs. The Roborock models extend the mops, but without that additional movement.
Mop lift reaches 10.5 mm on the Dreame, versus the 10 mm of the Qrevo Curv S5X and Edge S5A. A minimal difference in practice, although it may make a difference on very short-pile carpets. All three models use cold water to mop the floor, and all detect dirt both on the mops and on the floor to adjust cleaning intensity.
The Dreame L40s Pro Ultra can automatically remove the mops at the base when only vacuuming is needed. This function is convenient if you want to prevent the robot from dragging dry mops throughout the house in pure vacuum mode. The two Roborock models keep the mops permanently installed, although they raise them when they detect carpets.
Navigation System
Here we find notable differences. The Dreame L40s Pro Ultra integrates a LiDAR turret, dual camera with artificial intelligence, front 3D laser sensor and LED for night vision. This combination allows it to recognise up to 180 different types of obstacles, including pets and curtains. Additionally, it offers remote camera access from the mobile app.
The Roborock Qrevo Curv S5X and Edge S5A feature a LiDAR turret and obstacle avoidance system, but do not incorporate an AI camera or front 3D laser sensor. They also do not allow remote camera access, nor do they specifically recognise pets or curtains. They employ the RR Mason 11.0 algorithm for intelligent route planning.
In practice, the Dreame offers greater visual recognition capability and may be more precise in homes with many objects on the floor or with pets that leave toys scattered about. The Roborock models rely more on laser navigation and proximity sensors, which works perfectly in tidy environments.
Autonomy and Battery
All three devices share a 5,200 mAh battery, but the Dreame L40s Pro Ultra declares 220 minutes of autonomy versus the 180 minutes of the Roborock Qrevo Curv S5X and Edge S5A. Those additional 40 minutes can translate into approximately 60-80 m² more surface area covered in a single pass, depending on the cleaning mode and floor type.
For homes over 150 m², that difference can prevent the robot from having to return to the base to recharge mid-clean. In smaller flats, the 180-minute autonomy of the Roborock models is more than sufficient.
Smart Functions
All three robots can overcome obstacles, albeit with different capabilities. The Dreame L40s Pro Ultra navigates simple steps, whilst the Roborock Qrevo Curv S5X and Edge S5A overcome obstacles up to 20 mm in height. This capability is useful for passing over sliding door tracks or small level changes between rooms.
The Dreame incorporates a proprietary voice assistant integrated into the robot, in addition to compatibility with Alexa and Google Home. The two Roborock models only offer compatibility with external assistants. This allows the Dreame model to respond to voice commands without the need for other intermediary devices.
Multifunction Cleaning Base
All three bases perform auto-emptying of the dust bin, mop washing with hot water and drying with hot air. The Dreame L40s Pro Ultra boasts a 3rd generation tray self-cleaning system, whilst the Roborock models employ version 2.0. This means that the Dreame base cleans the ducts and tray where the mops are washed more effectively, reducing manual maintenance.
Only the Dreame includes an integrated detergent tank, which allows cleaning product to be added and automatically dispensed during mop washing. The Roborock models do not have this function. Additionally, the Dreame offers an optional plumbing connection kit that is purchased separately, useful if you want to avoid manually refilling and emptying tanks.
The Dreame dust bag reaches 3.2 litres, versus the 2.5 litres of the Qrevo Curv S5X and the 2.7 litres of the Edge S5A. Greater capacity means fewer bag changes, especially in homes with pets. The clean and dirty water tanks are also more generous on the Dreame: 4.5 litres and 4 litres respectively, against the 4 and 3 litres of the Curv S5X, and the 4 and 3.5 litres of the Edge S5A.
Dimensions
The Dreame L40s Pro Ultra measures 350 mm in diameter and 103.8 mm in height. The Roborock Qrevo Curv S5X and Edge S5A have 352 mm in diameter and 98 mm in height. Those almost 6 mm less in height on the Roborock models may allow them to slip under furniture or beds where the Dreame cannot enter. It's advisable to measure the tightest spaces in your home beforehand.
The bases present more pronounced differences. The Dreame measures 340 mm wide, 590.5 mm high and 456.7 mm deep. The Roborock Qrevo Curv S5X has a more compact and square shape: 450x450x450 mm. The Edge S5A occupies 340 mm wide, 521 mm high and 487 mm deep. The Curv S5X base is easier to fit into corners or confined spaces, whilst the Dreame requires somewhat more headroom.
Real-World User Experience
The Dreame L40s Pro Ultra is better suited to large homes thanks to its greater autonomy and base tank capacities. Its dual camera and advanced object recognition make it especially suitable for households with pets or young children who leave toys on the floor. The ability to automatically remove mops is practical if you alternate days of vacuuming only with days of complete mopping.
The Roborock Qrevo Curv S5X and Edge S5A stand out for their lower height, which facilitates cleaning under low furniture. The ability to overcome 20 mm obstacles gives them an advantage in homes with many level changes between rooms. They are solid options for those who prioritise precise laser navigation without the need for an AI camera.
The Dreame detergent tank makes a difference if you're looking for deeper mopping without manual intervention. The Roborock models wash the mops with hot water, but without automatically adding product. For very greasy floors or persistent stains, the Dreame system may offer better results.
Conclusion: Which to Choose?
Choose the Dreame L40s Pro Ultra if you have a large home (over 150 m²), live with pets or young children, and value advanced visual recognition with remote camera access. Also if you're looking for maximum autonomy between base emptyings and prefer a system that adds detergent automatically. The ability to remove mops at the base is a bonus if you usually alternate cleaning modes.
Choose the Roborock Qrevo Curv S5X if you need a compact base that takes up less space and a robot capable of getting under furniture 10 cm in height. Its ability to overcome 20 mm obstacles makes it ideal for homes with many door tracks or small steps. A good option if you don't need an AI camera and prefer the reliability of Roborock's laser navigation system.
Choose the Roborock Qrevo Edge S5A if you're looking for a balance between the capabilities of the Curv S5X and a somewhat more streamlined base design. It offers slightly larger water tanks than the Curv S5X and a 2.7-litre dust bag. It maintains the same reduced height of 98 mm and the ability to overcome 20 mm obstacles, with a base that occupies less width than the Dreame but more than the Curv S5X.
