Introduction
The Dreame L40s Pro Ultra and Roborock Qrevo CurvX represent two of the most advanced robot vacuum cleaners launching in 2025. Both models come equipped with multifunctional bases that handle washing and drying of mops, alongside automatic emptying of the dust bin. These are premium devices designed for users who want minimal intervention in their floor cleaning routine.
The Dreame model builds on the brand's reputation for packing high-end features at competitive prices, whilst Roborock continues to lead the market with refined technology and proven reliability. Both robots target households looking for comprehensive cleaning solutions that handle vacuuming and mopping with genuine effectiveness.
Suction Power and Brushing
The Roborock Qrevo CurvX takes the lead in raw suction with 22,000 Pa, giving it a noticeable edge over the Dreame L40s Pro Ultra's 19,000 Pa. In practice, this translates to more effective deep cleaning on carpets and better pickup of embedded dirt in textile fibres.
When it comes to the main brush, the approaches differ. The Dreame employs a dual HyperStream brush system, which uses two brushes anchored at one end to actively prevent hair tangles. The Roborock opts for its DuoDivide anti-tangle brush, designed to push hair towards the central suction channel. Both systems elevate the main brush during mopping to avoid wetting it unnecessarily.
The side brush configuration reveals an interesting distinction. Whilst both models feature extensible and anti-tangle side brushes, only the Dreame L40s Pro Ultra can lift its side brush when mopping. This prevents the brush from flicking dirty water around during wet cleaning, something that can be particularly useful on hard floors.
Mopping System
Both robots use dual rotating mops for wet cleaning, but the implementation varies. The Dreame L40s Pro Ultra extends its mops with a RoboSwing movement, allowing the robot to push the mop slightly under furniture edges and skirting boards. The Roborock Qrevo CurvX also extends its mops to reach edges, though without the swinging motion.
Mop elevation differs between the two. The Dreame lifts its mops by 10.5 mm, whilst the Roborock offers a range of 7-17 mm. This greater lift in the Roborock means better protection for carpets and rugs when transitioning between floor types.
A standout feature of the Dreame is its ability to automatically remove the mops at the base when you only want to vacuum. The Roborock lacks this function, meaning you'd need to manually detach the mops if you want pure vacuuming without the mopping pads attached. For households with mixed flooring, this automation can save regular manual intervention.
Both models detect dirt on the mops themselves and on the floor, triggering additional cleaning passes or mop washing cycles as needed. Neither heats the water used for mopping the floor itself, relying instead on heated water at the base for mop cleaning.
Navigation Technology
The navigation systems showcase different engineering priorities. The Dreame L40s Pro Ultra uses a traditional 3D LiDAR turret, resulting in a robot height of 103.8 mm. The Roborock Qrevo CurvX features a retractable LiDAR turret that drops the height to just 79.8 mm, making it significantly better at accessing low-clearance spaces under furniture.
Both robots use dual AI cameras and frontal 3D laser sensors for obstacle avoidance. The Dreame's CleanGenius AI recognises 180 different objects, considerably more than the Roborock's 108. This broader recognition includes curtain detection, which the Roborock doesn't offer. In homes with long curtains or drapes, the Dreame's ability to identify and avoid them reduces the risk of entanglement.
The Roborock runs on its RR Mason 11.0 algorithm with SmartPlan 2.0 intelligence, whilst the Dreame uses CleanGenius AI with specific stain recognition capabilities. Both provide remote camera access and LED lighting for night-time vision, alongside recognition of pets to avoid disturbing them or their belongings.
Battery and Autonomy
The Roborock Qrevo CurvX packs a 6,400 mAh battery compared to the Dreame's 5,200 mAh. Despite this difference, both models claim 220 minutes of runtime, suggesting the Roborock's higher suction power draws more energy to achieve similar autonomy.
For larger homes, the Roborock's extra battery capacity provides a safety margin, particularly when using maximum suction settings or tackling multiple rooms in one session. The Dreame's smaller battery still delivers respectable performance but may require a mid-clean recharge more often in extensive properties.
Smart Features
Both robots can climb single obstacles up to 20 mm, allowing them to transition between rooms with small thresholds or move onto low-profile rugs. Neither model includes a robotic arm.
Each robot features its own voice assistant alongside compatibility with external systems like Alexa and Google Home. This gives flexibility in how you control and interact with the devices, whether through their dedicated apps or integrated smart home ecosystems.
Multifunctional Base Station
The base stations handle automatic dust bin emptying, mop washing with hot water, and hot air drying. Both include third-generation self-cleaning of the washing tray, maintaining hygiene without manual scrubbing.
A key difference lies in the detergent dispenser. The Dreame L40s Pro Ultra includes a dedicated detergent tank, automatically adding cleaning solution during mop washing. The Roborock Qrevo CurvX doesn't have this feature, requiring manual addition of detergent to the clean water tank if you want to use it.
Storage capacity varies across the board. The Dreame offers a 3.2-litre dust bag compared to the Roborock's 2.5 litres. For water, the Dreame holds 4.5 litres of clean water and 4 litres of dirty water, whilst the Roborock manages 4 litres clean and 3 litres dirty. These differences mean the Dreame requires less frequent maintenance in larger homes or with heavier cleaning demands.
The Dreame also offers an optional plumbing connection kit, available as a separate purchase. This allows for continuous water supply and drainage, though it's not integrated as standard. The Roborock doesn't offer this option at all.
Size and Dimensions
The robot dimensions tell an important story about usability. The Roborock Qrevo CurvX measures 353 mm in diameter and just 79.8 mm tall, making it one of the slimmest premium robots available. The Dreame L40s Pro Ultra is slightly narrower at 350 mm but stands at 103.8 mm due to its fixed LiDAR turret. That 24 mm difference in height is substantial when it comes to fitting under beds, sofas, and low cabinets.
The base stations have contrasting footprints. The Dreame base is taller and narrower (340 mm wide, 590.5 mm high, 456.7 mm deep), whilst the Roborock base is more cube-like (450 mm in all dimensions). The Dreame's vertical design may suit tighter spaces alongside walls, whereas the Roborock's more compact overall form can be easier to tuck into corners.
Real-World Performance
For homes with low furniture, the Roborock Qrevo CurvX has a clear advantage. Its 79.8 mm height allows it to clean under spaces the Dreame simply cannot access. This matters particularly in bedrooms with platform beds or living rooms with low-slung sofas.
Pet owners will find both models capable, but the Roborock's higher suction power gives it an edge on embedded pet hair in carpets. The Dreame's HyperStream brush and greater obstacle recognition (including specific pet detection) make it equally competent, particularly on hard floors where suction power matters less than brush design.
In larger properties, the Roborock's bigger battery and water tanks reduce interruptions, though the Dreame's larger dust bag means less frequent bag replacement. The Dreame's automatic mop removal is genuinely useful for mixed-floor homes where you regularly switch between vacuuming-only and full mopping routines.
The detergent dispenser in the Dreame adds convenience for those who want consistently enhanced cleaning without manual dosing. The Roborock requires you to add detergent to the clean water tank yourself, which is less automated but still perfectly functional.
Conclusion: Which Should You Choose?
Choose the Dreame L40s Pro Ultra if: you want automatic mop removal for flexible cleaning routines, value the convenience of an integrated detergent dispenser, need extensive object recognition including curtain detection, or have a home layout that doesn't require ultra-low clearance. The larger dust bag and water tanks also suit bigger homes or those who prefer less frequent maintenance.
Choose the Roborock Qrevo CurvX if: you need a robot that can access low furniture thanks to its 79.8 mm height, want maximum suction power for deep carpet cleaning, prefer a more compact base station, or value the brand's established reputation for reliability and app quality. The larger battery capacity provides peace of mind for extensive cleaning sessions.
Both represent excellent choices in the premium robot vacuum segment for 2025. The Dreame offers more automation features and maintenance convenience, whilst the Roborock delivers superior access to tight spaces and raw cleaning power. Your choice ultimately depends on your home layout and which features matter most to your daily routine.
