Introduction
The Dreame L40 Ultra AE and the Roborock Qrevo S Pro represent two high-end propositions within the robot vacuum cleaner market with multifunction base. The Dreame model arrived on the market in 2025, whilst the Qrevo S Pro from Roborock was launched in April 2026. Both units are designed to offer complete autonomous cleaning, combining powerful suction with advanced mopping and automated maintenance systems in their respective bases.
We're talking about solutions designed for users who want to delegate cleaning tasks as much as possible, especially in medium or large-sized homes. Both models integrate laser navigation technology and feature bases that wash and dry the mops automatically, although differences in tank capacities, power and smart functions mark out distinct usage profiles.
Power and Suction
Suction power marks a minimal but existing difference: the Dreame L40 Ultra AE offers 19,000 Pa, whilst the Roborock Qrevo S Pro stays at 18,500 Pa. In practice, both values sit in the high range of the market and guarantee effective dirt collection on all types of surfaces, including carpets.
Where a clear difference is noticeable is in the main brush design. The Dreame robot vacuum cleaner incorporates the TriCut 3.0 system, which combines bristles with blades to reduce hair tangles. The Roborock robot vacuum cleaner uses a simple brush, although it compensates for this apparent disadvantage with an anti-tangle side brush, a function that the Dreame does not include.
The Dreame L40 Ultra AE lifts its main brush during mopping, which prevents it from getting wet and allows more efficient cleaning when you only want to mop. The Roborock Qrevo S Pro does not have this central brush lifting capability. Neither model has an extendable side brush nor one that lifts during mopping.
Mopping
Both units use two rotating mops for mopping, but the Dreame's approach is more comprehensive. The L40 Ultra AE incorporates mop extension with lateral movement, which allows better reach of edges and corners. The Qrevo S Pro does not offer this function.
Mop lifting is practically identical: 10.5 mm on the Dreame compared to 10 mm on the Roborock. Sufficient in both cases to overcome thin carpets without wetting them. Both models mop with cold water and neither automatically removes the mops at the base when you only want to vacuum.
The Dreame stands out for its dual dirt detection system: it recognises both dirt accumulated on the mops and that present on the floor, adjusting mopping intensity or going over dirtier areas again. The Roborock Qrevo S Pro lacks these intelligent detection capabilities.
The bases of both models wash the mops with hot water and dry them with hot air, guaranteeing hygiene and preventing bad odours. This feature is fundamental for maintaining effective mopping in the long term.
Navigation System
Both robots employ a 3D LiDAR turret to map the home and plan efficient routes. However, the Dreame L40 Ultra AE goes several steps ahead in terms of artificial intelligence and environment recognition.
The Dreame model integrates an AI camera, front 3D laser sensor and night vision LED, which allows it to identify up to 120 different types of obstacles. Additionally, it specifically recognises pets and offers remote camera access, a useful function for home surveillance when we're not present.
The Roborock Qrevo S Pro does without an AI camera, front 3D laser sensor, LED and remote access. Although it has obstacle avoidance through its LiDAR system, it doesn't reach the Dreame's level of detailed recognition. The exact number of obstacles it can identify is not specified.
Regarding intelligent cleaning, the Dreame uses CleanGenius whilst the Roborock employs SmartPlan 2.0. Both systems optimise routes and adjust cleaning parameters according to each room's characteristics.
Autonomy and Battery
Both models mount 5,200 mAh batteries, a generous capacity that ensures prolonged cleaning sessions. The Roborock Qrevo S Pro declares an autonomy of 180 minutes, data that the Dreame L40 Ultra AE does not specify in its technical specifications.
In practice, with batteries of equal capacity, similar performance can be expected, although actual consumption will depend on factors such as the suction power used, the type of surface and whether simultaneous mopping is activated or not.
Smart Functions
Both robots can overcome obstacles up to 20 mm in height, sufficient to navigate most transitions between rooms, cables or small level changes. Both are compatible with external voice assistants such as Alexa or Google Home, facilitating control by voice commands.
Multifunction Cleaning Base
Here we find significant differences that affect maintenance and ease of use. The Dreame L40 Ultra AE incorporates second-generation tray self-cleaning, a system that keeps the area where the mops are washed more hygienic. The Roborock Qrevo S Pro does not include this function.
The detergent tank is another exclusive advantage of the Dreame, which automatically dispenses cleaning product during mop washing. The Roborock lacks this tank, which requires manually adding detergent if you want to use it.
The dust bag capacity reaches 3.2 litres in the Dreame compared to 2.7 litres in the Roborock. Although the difference isn't huge, it means fewer emptyings in the Dreame model, especially useful in homes with pets or greater dust accumulation.
The water tanks also favour the Dreame: 4.5 litres of clean water and 4 litres of dirty water, compared to the Roborock's 4 and 3.5 litres respectively. Greater capacity means more mopping autonomy without manual intervention.
The Dreame also offers an optional plumbing connection kit that is purchased separately, allowing complete automation of water filling and emptying. The Roborock does not have this possibility.
Dimensions
The Dreame's diameter is 350 mm, slightly smaller than the Roborock's 353 mm. The height is also very similar: 97 mm on the Dreame compared to 96.5 mm on the Roborock. Minimal differences that in practice don't affect the ability to pass under furniture.
The bases present more notable variations. The Dreame's measures 456.7 mm in depth and 590.5 mm in height, whilst the Roborock's reaches 487 mm in depth but only 519 mm in height. The width is identical in both: 340 mm. It's advisable to measure the available space before deciding, especially if you're thinking of placing the base in a tight gap.
Real-World Usage Experience
For large homes, the Dreame L40 Ultra AE offers clear advantages thanks to its larger water tanks and more spacious dust bag. Mopping autonomy will be superior and emptyings less frequent. The robot's dust tank is also more generous (395 ml compared to 330 ml), which allows longer sessions without returning to the base.
In homes with pets, the Dreame's TriCut 3.0 brush helps reduce hair tangles in the main brush, although the Roborock compensates with its anti-tangle side brush. The Dreame's greater dust bag capacity is practical when there's abundant hair shedding.
The Dreame's dirt detection system makes a difference in kitchens or high-traffic areas, where the robot can automatically go over the dirtiest areas again without needing manual configuration. The Roborock requires greater user intervention to adjust cleaning intensity.
The Dreame's mop extension notably improves edge and skirting board mopping, an area where traditional robots usually leave accumulated dirt. If corner mopping is a priority, this function is decisive.
For those who value home surveillance, the Dreame's remote camera access adds an extra functionality beyond cleaning. The night vision LED and pet recognition also provide peace of mind if there are animals in the house.
Conclusion: Which to Choose?
Choose the Dreame L40 Ultra AE if... you're looking for maximum autonomy and want to forget about maintenance for longer. Its larger tanks, integrated detergent tank and tray self-cleaning reduce manual interventions. It's especially recommended in large homes, with pets or if you value edge mopping thanks to the mop extension. Intelligent dirt detection and remote camera access are differentiating functions that justify its choice if you're looking for cutting-edge technology.
Choose the Roborock Qrevo S Pro if... you prefer an established brand with proven reputation in reliability and mobile application. Although it has somewhat smaller tanks and lacks some of the Dreame's advanced functions, it offers solid performance in vacuuming and mopping. Its anti-tangle side brush can be advantageous in certain scenarios, and the declared autonomy of 180 minutes guarantees sufficient coverage for most homes. It's a balanced option for those seeking proven quality without needing the latest technological innovations.
