✨ VS Analyze · VacuumSpain comparison technology. AI-generated explanation based on verified technical data.
Introduction
We're looking at three high-end robot vacuum cleaners launched between 2024 and 2025 that share many advanced features, though with important differences in their capabilities. The Dreame L40 Ultra AE and the Dreame L40s Pro Ultra represent Dreame's offering for this premium segment, whilst the Roborock Qrevo Curv S5X arrives as a benchmark from an established brand in the sector. All three are equipped with complete multifunctional bases with hot water and hot air mop washing and drying, as well as laser navigation systems and suction powers exceeding 18,000 Pa.
These models are designed for users seeking maximum automation in home cleaning, especially in medium or large-sized homes where manual maintenance is more demanding. The difference between them lies mainly in details of artificial intelligence, brushing systems and specific functions that can make a difference to the daily user experience.
Power and Suction
Both Dreame models share a suction power of 19,000 Pa, slightly higher than the 18,500 Pa of the Roborock Qrevo Curv S5X. In practice, this 500 Pa difference doesn't usually translate into a noticeable change in day-to-day performance, although it may be noticed on medium or high-pile carpets.
Where significant differences do appear is in the brushing system. The Dreame L40 Ultra AE features a TriCut 3.0 brush, which combines bristles with blades to reduce hair tangles. The L40s Pro Ultra takes a qualitative leap with a dual main brush system, designed to improve capture in a single pass. The Roborock opts for its DuoDivide Antienredos brush, which pushes hairs towards the central suction gap to minimise tangles.
The side brush also presents important variations. Only the Dreame L40s Pro Ultra incorporates side brush lifting during mopping, which prevents it from dragging wet dirt across already clean areas. Both this model and the Roborock feature an extendable side brush to improve corner cleaning, a function not present on the L40 Ultra AE. Additionally, the L40s Pro Ultra and the Qrevo Curv S5X integrate anti-tangle systems in the side brush.
All three robots lift the main brush during mopping, except the Roborock which doesn't have this function. This can be relevant when mopping delicate floors where contact from the main brush could scratch the surface.
Mopping
The mopping system is one of the shared strengths: all three models use two rotating mops that are washed with hot water at the base and dried with hot air. This configuration ensures that the mops always return clean to the floor during the mopping session.
All extend the mops to better reach edges. The Dreame L40 Ultra AE and the L40s Pro Ultra also incorporate the Roboswing system, which performs a lateral movement to introduce the mop under furniture or overhangs. The Roborock simply extends the mop without this additional movement.
Mop lifting is very similar: 10.5 mm on the Dreame models compared to 10 mm on the Roborock. Sufficient to avoid wetting short-pile carpets, though insufficient for thick carpets where it's advisable to define no-mop zones in the app.
A notable difference: only the Dreame L40s Pro Ultra can automatically remove the mops at the base when a vacuum-only session is scheduled. This avoids dragging dry mops unnecessarily and reduces wear. The other two models lift the mops but don't remove them completely.
All three detect dirt both on the mops and on the floor, adjusting the washing or scrubbing intensity as needed. This function is especially useful in kitchens or high-traffic areas.
Navigation System
All feature a LIDAR turret for laser mapping and navigation, but artificial intelligence capabilities mark notable differences. The Dreame L40 Ultra AE integrates an AI camera and front 3D laser sensor, recognising up to 120 different obstacles. The L40s Pro Ultra raises the stakes with dual AI camera and capacity to identify 180 obstacles, including specific curtain detection to avoid tangles.
The Roborock Qrevo Curv S5X doesn't specify how many obstacles it recognises and lacks an AI camera, front 3D laser sensor and night vision LED. It also doesn't offer remote camera access or pet recognition, functions present on both Dreame models. For homes with animals, this difference can be relevant if you're looking for monitoring or intelligent avoidance of areas where pets rest.
The Dreame models include a front LED to improve detection in low-light conditions, something the Roborock doesn't incorporate. In homes with dark corridors or scheduled night-time cleaning, this can translate into better obstacle identification.
Autonomy and Battery
All three are equipped with 5,200 mAh batteries, more than sufficient capacity for homes of up to 200-250 m² in combined vacuum-mop mode. The Dreame L40s Pro Ultra declares an autonomy of 220 minutes, whilst the Roborock Qrevo Curv S5X reaches 180 minutes. This data isn't specified for the L40 Ultra AE, although as it shares the battery with the L40s Pro Ultra, similar performance is expected.
In practice, actual autonomy will depend on the selected power mode, floor type and whether simultaneous mopping is activated. For large homes, it's worth considering models with greater declared autonomy, as they reduce interruptions for recharging during the cleaning session.
Smart Functions
All three robots can overcome obstacles up to 20 mm in height, except the Dreame L40s Pro Ultra which specifies capacity to navigate simple steps without detailing exact height. This function is useful for transitions between rooms with small level changes or sliding door guides.
The Dreame L40s Pro Ultra incorporates its own voice assistant, allowing direct interaction without needing to resort to Alexa or Google Home, although all three models are compatible with these external assistants. This function can be practical for users who prefer not to depend on third-party ecosystems.
Multifunctional Cleaning Base
All three bases perform auto-emptying of the dust container, hot water mop washing and hot air drying. All also include self-cleaning of the washing tray, though with different generations: the L40 Ultra AE and the Roborock feature second-generation systems, whilst the L40s Pro Ultra debuts a third generation that improves the process efficiency.
An important difference: both Dreame models integrate a detergent tank in the base, which automatically doses during mop washing. The Roborock doesn't include this function, so the user must manually add cleaning product to the clean water tank if they wish to use it.
Tank capacity also varies. The Dreame models offer a 3.2-litre dust bag, 4.5-litre clean water tank and 4-litre dirty water tank. The Roborock reduces these figures to 2.5, 4 and 3 litres respectively. For large homes or those with pets that generate a lot of hair, the Dreame's larger tanks reduce the frequency of emptying and refilling.
Both Dreame models allow the purchase of an optional kit for connection to water pipes and drainage, almost completely eliminating manual base maintenance. The Roborock doesn't offer this possibility.
Dimensions
The Dreame L40 Ultra AE is the lowest at 97 mm in height, followed by the Roborock at 98 mm and the L40s Pro Ultra at 103.8 mm. Those almost 7 mm of difference can determine the ability to pass under certain low furniture, sofas or beds with reduced legs. The diameter is practically identical: 350 mm on the Dreame models and 352 mm on the Roborock.
The Roborock's base is notably more compact, with a cubic shape of 450x450x450 mm. The Dreame bases measure 340 mm wide, 456.7 mm deep and 590.5 mm high, occupying more vertical space but less floor surface. It's advisable to measure the available space before deciding, especially if you plan to locate the base in cupboards or under worktops.
Real-World User Experience
For large homes, the Dreame L40s Pro Ultra offers the greatest declared autonomy (220 minutes) and the most generous tanks in the comparison, reducing interruptions and maintenance. Its ability to automatically remove the mops also simplifies vacuum-only sessions.
In homes with pets, both Dreame models stand out for their specific animal recognition, remote camera access for monitoring and brushes designed to reduce tangles. The L40s Pro Ultra's dual brush system can capture more hair in one pass, whilst the Roborock's DuoDivide brush also offers good anti-tangle performance.
For users who prioritise total automation, the Dreame models allow the addition of the pipe connection kit, almost completely eliminating manual intervention. Additionally, their integrated detergent tank automatically doses the cleaning product.
The Roborock Qrevo Curv S5X is more suitable if you're looking for a compact base that takes up less space, especially in homes where storage is limited. Its navigation system with RR Mason 11.0 algorithm is robust and reliable, although it lacks the advanced AI functions of the Dreame models.
If you need to pass under low furniture, the Dreame L40 Ultra AE with its 97 mm height can access spaces where the other two models can't reach. For floors with transitions or small steps, all three manage obstacles of up to 20 mm well.
Conclusion: Which to Choose?
Choose the Dreame L40 Ultra AE if you're looking for a complete robot at a presumably more competitive price than the L40s Pro Ultra, you prioritise the lowest height to pass under low furniture, and you don't need advanced functions such as automatic mop removal or dual AI camera. Ideal for medium-sized homes without specific monitoring requirements.
Choose the Dreame L40s Pro Ultra if you want maximum automation and artificial intelligence functions, you have pets and value specific animal recognition, you need the greatest autonomy and tank capacity, or you're interested in automatic mop removal for vacuum-only sessions. Perfect for large homes with high cleaning demands and minimal maintenance.
Choose the Roborock Qrevo Curv S5X if you prefer the reliability of an established brand in the sector, you need a compact base that takes up less space, you don't require AI camera functions or remote monitoring, and you value a proven navigation system like the RR Mason 11.0. Suitable for users seeking efficiency without additional technological complications.
