Introduction
The Dreame L40 Ultra, the Xiaomi Robot Vacuum 5 and the Xiaomi X20 Max represent three distinct propositions within the robot vacuum market with multifunction base. The first arrived in 2024 as Dreame's flagship, whilst the Xiaomi Robot Vacuum 5 is the Chinese brand's most recent offering for 2025. The X20 Max, also from 2024, is positioned as a more accessible alternative within Xiaomi's catalogue.
This robot vacuum comparison is particularly interesting because it pits two different philosophies against each other: the Dreame L40 Ultra focuses on advanced artificial intelligence and premium features, the Xiaomi Robot Vacuum 5 stands out for exceptional suction power, and the X20 Max offers solid performance without as many technological refinements. All feature a multifunction base that washes and dries the mops, but the differences in navigation, power and intelligent capabilities mark very distinct user profiles.
Power and Suction
The most striking difference in this robot vacuum comparison is in suction power. The Xiaomi Robot Vacuum 5 reaches an impressive 20,000 Pa, practically double the Dreame L40 Ultra with its 11,000 Pa. The X20 Max remains at 8,000 Pa, a more modest figure but sufficient for most homes. In practice, those 20,000 Pa of Xiaomi's most recent model make a difference on dense carpets or when there's a lot of embedded pet hair.
All three units mount the same TriCut 3.0 main brush, which combines bristles with blades to cut tangled hair. However, the Dreame L40 Ultra adds an important advantage: it can lift this brush during mopping. This prevents it from getting unnecessarily wet and allows more efficient cleaning when you only want to mop without dragging dry debris. Both Xiaomi models lack this function.
Regarding the side brush, the Dreame stands out again with automatic lifting during mopping. The Dreame L40 Ultra and the Xiaomi Robot Vacuum 5 share an extendable side brush and anti-tangle system, features that the X20 Max doesn't incorporate. This extension is practical for better sweeping corners, although it's worth considering whether it really justifies the price difference in each case.
Mopping
All three robots use a two rotating mop system, but the differences in implementation are notable. The Dreame L40 Ultra features mop extension with Roboswing movement, a system that makes the robot perform a slight swing to get the mops under ledges and furniture. Both Xiaomi models also extend the mops, although without that additional movement.
Mop lifting varies between models. The Xiaomi Robot Vacuum 5 reaches 15 mm, the highest of the three, which allows it to pass over low carpets without wetting them. The Dreame L40 Ultra remains at 10.5 mm and the X20 Max at 10 mm. For homes with thick carpets, those extra 5 mm of the Robot Vacuum 5 can make the difference.
The Dreame robot vacuum incorporates two very practical exclusive functions: it can automatically remove the mops at the base when you only want to vacuum, avoiding dragging them unnecessarily around the house. Additionally, it detects dirt both on the mops and on the floor, adjusting mopping as necessary. The Xiaomi models don't have these detection capabilities nor automatic removal.
All three bases wash the mops with hot water and dry them with hot air, essential functions to avoid bad odours and keep the mops in good condition. Here there are no significant differences between the three units.
Navigation System
Navigation is where the Dreame L40 Ultra deploys its most advanced technological arsenal. It mounts a dual AI camera capable of recognising up to 100 different types of obstacles, including pets and curtains. This precision allows the robot to adjust its behaviour according to what it detects: it can avoid cables, dodge toys or even identify that there's a curtain to avoid getting tangled. Remote camera access adds extra functionality, allowing you to monitor the house from your mobile.
The Xiaomi Robot Vacuum 5 opts for a more compact design with retractable LiDAR, which explains its reduced height of 88 mm. It incorporates a front 3D laser sensor to avoid obstacles, but lacks an AI camera. It doesn't recognise pets or curtains specifically, although its obstacle avoidance system works correctly with generic objects. The X20 Max uses a traditional LiDAR turret with 3D sensor and night vision LED, but also doesn't have an AI camera.
For homes with pets, the Dreame L40 Ultra offers clear advantages by identifying them specifically. In homes with many cables or toys on the floor, that recognition of 100 obstacles also provides greater precision. The Xiaomi Robot Vacuum 5 compensates with its low profile, which allows it to slip under furniture where the other two can't reach.
Autonomy and Battery
All three robots mount the same 5,200 mAh battery, but the actual autonomy differs quite a bit. The Dreame L40 Ultra lasts up to 194 minutes on a single charge, sufficient for large homes without needing intermediate recharges. The Xiaomi Robot Vacuum 5 reaches 140 minutes, whilst the X20 Max remains at 120 minutes.
This difference makes sense if we consider that the Robot Vacuum 5 consumes more energy with its 20,000 Pa of power. For flats up to 120-150 square metres, any of the three completes cleaning without problems. In larger houses, the Dreame L40 Ultra offers greater margin of safety.
Intelligent Features
The Dreame L40 Ultra can overcome obstacles up to 22 mm in height, slightly superior to the 20 mm of both Xiaomi models. In practice, this is noticeable when passing over door rails or level changes between rooms. Those extra 2 mm may seem little, but they mark the difference between the robot getting stuck or continuing without intervention.
An exclusive function of the Dreame robot vacuum is its own voice assistant, in addition to the standard compatibility with Alexa and Google Home that all three models share. It allows giving orders directly to the robot without going through external speakers, something convenient for quick adjustments during cleaning.
Multifunction Cleaning Base
All three bases offer the main functions: auto-emptying of the dust bin, mop washing with hot water and drying with hot air. However, the Dreame L40 Ultra adds important refinements. Its second-generation tray self-cleaning improves maintenance by reducing the frequency with which you have to clean it manually. Additionally, it includes a detergent tank that dispenses product during mop washing, improving mopping hygiene.
Storage capacity also varies. The Dreame L40 Ultra features a 3.2-litre dust bag compared to the 2.5 litres of the Xiaomi models. The clean water tanks are 4.5 litres in the Dreame and 4 litres in the Xiaomi. Dirty water is stored in 4 litres (Dreame) compared to 3.8 litres (Xiaomi). Small differences, but in large homes they mean fewer emptyings and refills.
The Dreame L40 Ultra offers an optional plumbing connection kit, which is purchased separately. It allows connecting the base directly to running water and drainage, completely eliminating tank maintenance. The Xiaomi models don't have this option available.
Dimensions
The Xiaomi Robot Vacuum 5 stands out with its 88 mm height, the lowest of the three. This allows it to slip under furniture and beds where the Dreame L40 Ultra (103.8 mm) or the X20 Max (97 mm) can't reach. If you have low furniture, those 15 mm difference with the Dreame are decisive. All three share the same diameter of 350 mm.
The bases have similar dimensions, although with small variations. The Dreame L40 Ultra measures 340 mm wide, 590.5 mm high and 456.7 mm deep. The Robot Vacuum 5 is slightly wider (360 mm) and deeper (470 mm), but somewhat lower (572 mm). The X20 Max is the most compact in base with 340 x 563 x 420 mm. It's advisable to measure the available space before deciding, especially the depth.
Real-world experience
For large homes, the Dreame L40 Ultra offers the best combination of autonomy (194 minutes) and storage capacity (3.2 litres of dust, 4.5 litres of clean water). Its ability to detect dirt and adjust mopping reduces the need for manual touch-ups. Automatic mop removal is practical when you only want to vacuum specific areas without dampening the floor.
In homes with pets, the Xiaomi Robot Vacuum 5 stands out for its 20,000 Pa power, ideal for hair embedded in carpets. However, the Dreame L40 Ultra counters with specific pet recognition, avoiding unpleasant surprises, and liftable brushes that get less dirty. All three mount the TriCut 3.0 brush that cuts hair, reducing tangles.
For flats with lots of low furniture, the Xiaomi Robot Vacuum 5 slips where the others can't with its 88 mm height. The Dreame L40 Ultra compensates with greater ability to overcome obstacles (22 mm) and its Roboswing system that gets the mops under ledges.
If you're looking for total automation with minimum maintenance, the Dreame L40 Ultra wins with detergent tank, improved tray self-cleaning and plumbing connection kit option. The Xiaomi Robot Vacuum 5 requires more manual attention, although its raw power compensates in deep cleaning.
Conclusion: Which to choose?
Choose the Dreame L40 Ultra if you're looking for the best robot vacuum 2025 in terms of artificial intelligence and automation. Ideal for homes with pets where you need specific recognition, large houses that benefit from its 194 minutes of autonomy, or if you value premium features such as dirt detection, automatic mop removal and detergent tank. Also if you plan to connect the base to plumbing to forget about maintenance. Its dual camera and recognition of 100 obstacles make a difference in homes with many objects on the floor.
Choose the Xiaomi Robot Vacuum 5 if the absolute priority is suction power. Its 20,000 Pa are unbeatable for dense carpets or very embedded pet hair. Perfect if you have low furniture thanks to its 88 mm height, and sufficient for medium-sized flats where 140 minutes of autonomy are enough. Good option if you don't need advanced object recognition and prefer to invest in raw power rather than artificial intelligence. The 15 mm mop lifting also helps with carpets.
Choose the Xiaomi X20 Max if you're looking for a competitive Xiaomi robot vacuum
