Introduction
Dreame presents three high-end robots that share a design philosophy but hide important differences in their features. The Dreame L10s Ultra Gen 3 arrived in November 2025, whilst the L40 Ultra and X40 Ultra were launched in 2024. All three units feature a complete multifunction base, capable of washing and drying the mops automatically, as well as emptying the robot's dust container.
These are solutions designed for those seeking real automation in home cleaning. The X40 Ultra stands out as the option with the greatest autonomy thanks to its 6,400 mAh battery, whilst the L10s Ultra Gen 3 impresses with suction power that far exceeds its siblings.
Power and Suction
The most striking difference between these models lies in suction capacity. The L10s Ultra Gen 3 more than doubles the power of its companions by offering 25,000 Pa, an exceptional figure that places it at the pinnacle of what's currently available. The L40 Ultra remains at 11,000 Pa and the X40 Ultra at 12,000 Pa, values more than sufficient for most homes but which mark a distance from the November 2025 model.
Regarding the brushing system, the L40 Ultra features the TriCut 3.0, designed with bristles and blades that cut tangled hair. The L10s Ultra Gen 3 and X40 Ultra are equipped with Cepillo Simplificado, which reduces tangles thanks to its configuration. All three models have an extendable side brush to improve corner cleaning.
The L40 Ultra and X40 Ultra can lift both the main brush and the side brush when they activate mopping mode, preventing the bristles from touching the wet floor. This function is not present in the L10s Ultra Gen 3. Additionally, the side brush of the L40 and X40 Ultra features an anti-tangle system, something the November 2025 model does not incorporate.
Mopping
All three robots mop with a dual rotating mop system and can extend them laterally thanks to Roboswing movement, which allows better edge reach and slightly inserts the mops under furniture or protrusions. Mop lifting is identical in all: 10.5 mm, sufficient to pass over thin carpets without wetting them.
The water they use to mop the floor is cold in all three cases. The important difference appears in dirt detection. The L40 Ultra and X40 Ultra can identify when the mops are dirty and when the floor requires additional scrubbing, adjusting their behaviour. The L10s Ultra Gen 3 does not have this capability.
Another advantage of the L40 and X40 Ultra is that they can automatically remove the mops at the base when you only need to vacuum, preventing them from being dragged unnecessarily. The L10s Ultra Gen 3 does not offer this option. All three bases wash the mops with hot water and dry them with hot air, guaranteeing hygiene and preventing bad odours.
Navigation System
All feature LiDAR turret to map the home and front 3D laser sensor that helps avoid obstacles. However, the L40 Ultra and X40 Ultra incorporate dual camera with artificial intelligence, absent in the L10s Ultra Gen 3. This camera allows recognition of up to 100 obstacles in the case of the L40 Ultra and 120 in the X40 Ultra, whilst the L10s Ultra Gen 3 does not specify how many objects it can identify.
The L40 and X40 Ultra can detect curtains, adjusting their behaviour to avoid tangling, and feature front LED for night vision. Additionally, they allow remote camera access from the mobile, a useful function for home surveillance. The L10s Ultra Gen 3 lacks these features as it does not have an AI camera.
All three recognise pets and use Dreame's CleanGenius system to optimise cleaning routes. The L40 and X40 Ultra employ the AI Sage 11.0 processor, whilst the L10s Ultra Gen 3 does not specify its CPU.
Autonomy and Battery
The X40 Ultra clearly distances itself with a 6,400 mAh battery that provides 194 minutes of autonomy. The L10s Ultra Gen 3 and L40 Ultra feature 5,200 mAh, but the former achieves 231 minutes compared to the latter's 194. This greater duration of the L10s Ultra Gen 3 is striking considering it has less battery capacity than the X40 Ultra.
In practice, the L10s Ultra Gen 3 offers the greatest time autonomy despite not having the largest battery, probably thanks to optimisations in energy consumption. For large homes, this difference can translate into complete cleans without the need for intermediate recharges.
Smart Functions
The ability to overcome obstacles varies slightly: the L10s Ultra Gen 3 can handle steps up to 20 mm, whilst the L40 and X40 Ultra reach 22 mm. Two millimetres that can make the difference with certain types of carpets or transitions between rooms.
The L40 Ultra includes its own voice assistant, allowing commands to be given directly to the robot without going through Alexa or Google Home. The L10s Ultra Gen 3 and X40 Ultra do not have this function, although all three are compatible with external assistants.
Multifunction Cleaning Base
All three bases share many characteristics: auto-emptying of the dust container into a 3.2-litre bag, mop washing with hot water, drying with hot air, detergent tank, and clean water tanks of 4.5 litres and dirty water of 4 litres. They also offer an optional kit for connection to water pipes, although this does not come integrated as standard.
The difference lies in the self-cleaning of the tray where the mops are washed. The L10s Ultra Gen 3 debuts the third generation of this system, whilst the L40 and X40 Ultra use the second generation. This improvement should translate into less manual maintenance of the base.
Dimensions
All three robots measure 350 mm in diameter and their bases have practically the same measurements: 340 mm wide and around 590 mm high. The depth of the L10s Ultra Gen 3 base is 457 mm, half a millimetre more than the other two models, an irrelevant difference.
Robot height does matter. The L10s Ultra Gen 3 and X40 Ultra measure 97 mm, whilst the L40 Ultra reaches 103.8 mm. Almost 7 millimetres that can determine whether the robot accesses under certain low furniture. For those with sofas or beds with little separation from the floor, this is worth considering.
Real-World Experience
The L10s Ultra Gen 3 stands out when the priority is raw suction power and maximum autonomy. Its 25,000 Pa is ideal for thick carpets or homes with much accumulated dirt. Being lower, it accesses better under furniture. However, the absence of an AI camera limits its advanced recognition capabilities and it cannot adjust mopping according to detected dirt.
The L40 Ultra offers an interesting balance: dual camera with recognition of 100 obstacles, dirt detection on mops and floor, automatic mop removal, and its own voice assistant. It sacrifices suction power and autonomy compared to the L10s Ultra Gen 3, but gains in intelligence. Its greater height can be a drawback under very low furniture.
The X40 Ultra combines the largest battery with all the smart functions of the L40 Ultra, additionally recognising 120 obstacles. It maintains the reduced height of 97 mm of the L10s Ultra Gen 3. For large houses where autonomy is critical and intelligent navigation is valued, this model makes sense. The power of 12,000 Pa, although inferior to the L10s Ultra Gen 3, remains competent.
In homes with pets, all three recognise animals, but the L40 Ultra's TriCut 3.0 brush can handle hair better thanks to its blades. The L10s Ultra Gen 3 and X40 Ultra, with their simplified brushes, also reduce tangles, although they lack an anti-tangle system on the side brush.
Conclusion: Which to Choose?
Choose the Dreame L10s Ultra Gen 3 if you're looking for the maximum available suction power and the greatest autonomy in minutes. Ideal for homes with demanding carpets, large surface areas to clean, or if you need the robot to pass under low furniture. The third generation of tray self-cleaning reduces maintenance. Accept that you're giving up an AI camera and advanced detection functions.
Choose the Dreame L40 Ultra if you value artificial intelligence and advanced obstacle recognition. The dual camera, dirt detection, remote access, night LED and its own voice assistant make it the most complete in smart functions. Suitable for those who want to monitor the home from their mobile or have pets and objects requiring precise navigation. Bear in mind its greater height if your furniture is very close to the floor.
Choose the Dreame X40 Ultra if you need to combine extended autonomy thanks to its 6,400 mAh battery with all the intelligent capabilities of the L40 Ultra. It recognises more obstacles than the latter and maintains the reduced height of the L10s Ultra Gen 3. Perfect for large houses where a single charge must cover much surface area without giving up advanced navigation, curtain detection or camera access. The relationship between autonomy, compact height and AI functions positions it as a balanced option for spacious homes with varied requirements.
