✨ VS Analyze · VacuumSpain comparison technology. AI-generated explanation based on verified technical data.
Introduction
We're looking at three high-end robots that represent the most advanced in automated cleaning during 2024 and 2025. The Dreame L40s Pro Ultra arrives as the brand's most recent offering, launched in 2025, whilst the Roborock Qrevo Edge S5A and the Dreame X40 Ultra were introduced in 2024. All three incorporate a complete multifunctional base with auto-emptying, mop washing and drying, which guarantees minimal maintenance and professional results in both vacuuming and mopping.
These models are designed for demanding users seeking total autonomy and advanced technology. The differences between them are especially relevant if you have pets, multi-level homes or need to pass under low furniture frequently.
Power and Suction
Suction power marks notable differences. The Dreame L40s Pro Ultra leads with 19,000 Pa, followed closely by the Roborock Qrevo Edge S5A with 18,500 Pa. The Dreame X40 Ultra remains at 12,000 Pa, a figure that's still powerful but clearly lower. In practice, this difference is especially noticeable on thick carpets or when there's accumulated pet hair.
The brushing system presents important variations. The L40s Pro Ultra incorporates a dual main brush, whilst the Roborock opts for its DuoDivide anti-tangle system and the X40 Ultra mounts a single brush. All three include anti-tangle technology in their side brushes, something essential if you live with long-haired pets.
Where the Roborock falls behind is in brush lifting. Both the L40s Pro Ultra and the X40 Ultra can raise the main brush during mopping, preventing it from getting wet and improving washing efficiency. The Qrevo Edge S5A lacks this function, which can be an inconvenience if you frequently alternate between vacuuming and mopping. All three models do raise the side brush and feature side extension to better reach corners.
Mopping
All three robots mount a two rotating mop system, the current standard in high-end models. All extend the mops to reach edges, although the L40s Pro Ultra and the X40 Ultra add Dreame's Roboswing system, which performs a lateral movement to get the mop under furniture overhangs.
Mop lifting is practically identical: 10.5 mm on both Dreame models and 10 mm on the Roborock. Sufficient to climb onto medium-thickness carpets without wetting them. All three use cold water to mop the floor, none heats the water inside the robot.
A crucial difference appears in mop management. The Dreame L40s Pro Ultra and the X40 Ultra can automatically detach the mops when they return to the base, allowing vacuum-only sessions without having to remove them manually. The Roborock Qrevo Edge S5A doesn't offer this possibility, forcing you to remove them by hand if you only want to vacuum. This can be tedious in day-to-day use.
All three detect dirt both on the mops and on the floor, automatically adjusting cleaning intensity and returning to re-mop especially dirty areas.
Navigation System
Here the differences are substantial. Both Dreame models incorporate dual AI camera, front 3D laser sensor, LED for night vision and remote camera access from your mobile. The Roborock Qrevo Edge S5A dispenses with all this, relying solely on its LiDAR turret and basic obstacle avoidance system.
The Dreame L40s Pro Ultra recognises up to 180 different types of obstacles, the X40 Ultra identifies 120, whilst the Roborock doesn't specify this figure. In homes with young children or pets, this recognition capability proves very valuable. The Dreame models specifically detect pets and curtains, adjusting their behaviour to avoid disturbing them or getting caught.
Remote camera access allows you to monitor your home whilst the robot cleans, a function only offered by the L40s Pro Ultra and the X40 Ultra. The Roborock lacks a front camera, so this option isn't available.
Regarding processing, the Roborock mounts the RR Mason 11.0 algorithm, whilst the X40 Ultra uses Dreame's AI Sage 11.0. The L40s Pro Ultra employs the CleanGenius system, although the exact processor version isn't specified.
Autonomy and Battery
The Dreame X40 Ultra stands out with 6,400 mAh capacity, offering 194 minutes of autonomy. The Dreame L40s Pro Ultra and the Roborock Qrevo Edge S5A share 5,200 mAh, but the former achieves 220 minutes compared to the Roborock's 180. This means the L40s Pro Ultra is more energy efficient despite having the same battery.
For large homes, those extra 40 minutes of the L40s Pro Ultra can make the difference between completing cleaning in a single session or having to recharge. The X40 Ultra, despite its larger battery, sits at a middle point with sufficient autonomy but without reaching the L40s Pro Ultra.
Smart Functions
All three robots overcome obstacles, though with differences. The X40 Ultra reaches 22 mm, the Roborock 20 mm, and the L40s Pro Ultra overcomes simple steps without specifying exact height. These capabilities allow them to navigate thick cables, rugs or small level changes between rooms.
Only the Dreame L40s Pro Ultra incorporates its own voice assistant, allowing you to give it commands directly without going through Alexa or Google Home. All three are compatible with external assistants, but having an integrated one adds convenience and speed in voice control.
Multifunctional Cleaning Base
All three bases perform auto-emptying, hot water washing and hot air drying of the mops. The Dreame L40s Pro Ultra boasts third-generation tray self-cleaning, the X40 Ultra second-generation, and the Roborock version 2.0. These technologies reduce manual maintenance of the base itself.
An important difference: only the two Dreame models include a detergent tank in the base. The Roborock Qrevo Edge S5A lacks one, limiting itself to washing with hot water. Adding detergent notably improves results on floors with grease or difficult stains.
Regarding capacities, the L40s Pro Ultra and the X40 Ultra share 3.2 litres dust bag, 4.5 litres clean water and 4 litres dirty water. The Roborock is somewhat tighter: 2.7 litres bag, 4 litres clean water and 3.5 dirty. For large homes, these differences require emptying and refilling the Roborock more frequently.
Both Dreame models offer an optional plumbing connection kit, purchased separately and allowing you to forget about manually refilling and emptying the tanks. The Roborock doesn't have this option.
Dimensions
The Roborock Qrevo Edge S5A measures 98 mm in height, making it the lowest of the three. The Dreame X40 Ultra reaches 97 mm (practically identical), whilst the L40s Pro Ultra rises to 103.8 mm. Those almost 6 mm extra of the L40s Pro Ultra may prevent it from accessing under sofas or low beds where the other two can enter.
The diameter is almost identical in all three: 350 mm on the Dreame models and 352 mm on the Roborock. Imperceptible differences in practice.
The bases of the L40s Pro Ultra and X40 Ultra are identical: 340 mm wide, 590.5 mm high and 456.7 mm deep. The Roborock base measures 340 mm wide, 521 mm high and 487 mm deep. It's lower but also deeper, occupying more space forwards. It's worth measuring carefully before deciding where to place it.
Real-World Experience
For large homes, the Dreame L40s Pro Ultra offers the best combination: maximum power, greater effective autonomy and generous tanks. Its height may be a problem if you have very low furniture, but in ample spaces without that limitation it proves the most complete option.
If you live with pets, both the L40s Pro Ultra and the X40 Ultra come out ahead thanks to their specific animal recognition, dual camera and greater obstacle identification capability. The Roborock, without front camera or pet recognition, may prove clumsier in these environments.
The Roborock Qrevo Edge S5A shines for its lower height, ideal for passing under practically any furniture. It also proves simpler in its approach: without camera or surveillance functions, it focuses on cleaning efficiently without complications. That said, the absence of a detergent tank and automatic mop detachment reduces convenience.
The Dreame X40 Ultra sits at an interesting middle point: it has all the camera and AI technology of the L40s Pro Ultra, measures less height, but sacrifices suction power and effective autonomy. Its 6,400 mAh battery partially compensates, although it doesn't reach the minutes of the L40s Pro Ultra.
Conclusion: Which to Choose?
Choose the Dreame L40s Pro Ultra if you're looking for the most powerful and autonomous robot, with the latest navigation and obstacle recognition technology. Ideal for large homes, with pets, and if you don't have height problems under furniture. The detergent tank and automatic mop detachment add much convenience. It's the most complete and recent option, launched in 2025.
Choose the Roborock Qrevo Edge S5A if you prioritise passing under low furniture and prefer a simpler robot without cameras or surveillance functions. It offers excellent power and reliability, although you'll have to do without the detergent tank and remove the mops manually when you only want to vacuum. A good option if you're looking for efficiency without technological complications.
Choose the Dreame X40 Ultra if you want all the artificial intelligence and pet recognition of the L40s Pro Ultra, with lower height to access under more furniture, but can accept less suction power. Its higher capacity battery partly compensates for the lower energy efficiency. It represents a balance between advanced technology and more compact dimensions.
