Introduction
Dreame presents three very different proposals within its robot vacuum catalogue. The Dreame D20, launched in 2025, is a model focused on pure vacuuming with a traditional charging base configuration. In contrast, the Dreame L10s Ultra Gen 2 from 2024 introduces the multifunction base with mop washing and drying using hot air, a solution designed for those seeking to automate mopping as well. The Dreame L40s Pro Ultra, also from 2025, represents the brand's most advanced range with dual camera technology with artificial intelligence and features that elevate the robot's autonomy to another level.
Each one is designed for different profiles. The D20 may be interesting if you only need powerful vacuuming without complications. The L10s Ultra Gen 2 is a balanced option for those who want automatic mopping without sacrificing good overall performance. The L40s Pro Ultra is aimed directly at homes where maximum automation and ability to adapt to different types of dirt and obstacles are sought.
Power and Suction
Suction power marks notable differences. The Dreame D20 offers 13,000 Pa, a solid figure for a model without a multifunction base. The Dreame L10s Ultra Gen 2 remains at 10,000 Pa, sufficient for most everyday situations but somewhat below the D20. The Dreame L40s Pro Ultra rises to 19,000 Pa, making it the most powerful of the three and an especially suitable option for carpets or homes with pets.
Regarding the brushing system, the D20 and the L40s Pro Ultra share the dual HyperStream brush from Dreame, designed to reduce hair tangles. The L10s Ultra Gen 2 uses a single brush, which may mean more maintenance if there is long hair at home. The L40s Pro Ultra's main brush lifts during mopping, preventing it from getting wet and ensuring that only the mops come into contact with the floor. This does not occur in the D20 or the L10s Ultra Gen 2.
The side brush also presents important differences. In the L40s Pro Ultra it is extendable, liftable and anti-tangle, which improves sweeping in corners and prevents it from getting unnecessarily wet during mopping. The other two models lack these functions, which may translate into less effective edge sweeping and greater risk of tangles.
Mopping
The Dreame D20 uses a static mop without lifting capability or edge extension. It has no multifunction base, so washing and drying the mops is left to the user. It is a basic system that can work for light maintenance, but is not designed for deep mopping.
The Dreame L10s Ultra Gen 2 incorporates two rotating mops with edge extension thanks to the Roboswing system, which allows the robot to perform a lateral movement to better reach skirting boards. The mops lift 10.5 mm when detecting carpets or when returning to the base. The base washes the mops with hot water and dries them with hot air, which reduces bad odours and improves hygiene. It includes a detergent tank to dispense product during mop washing.
The Dreame L40s Pro Ultra maintains the same system of two rotating mops with 10.5 mm lifting and edge extension. The difference lies in the third-generation self-cleaning of the washing tray and in the ability to automatically remove the mops at the base if you only want to vacuum. Additionally, it detects dirt both on the mops and on the floor, adjusting mopping intensity or repeating areas if necessary. This can be especially noticeable in kitchens or entrances where dirt accumulates more.
Navigation System
All three models use LiDAR turret with front 3D laser sensor to avoid obstacles. The Dreame D20 does not have an artificial intelligence camera, which limits its ability to recognise specific objects. The Dreame L10s Ultra Gen 2 incorporates pet recognition thanks to its CleanGenius system, although it does not have a front camera.
The Dreame L40s Pro Ultra makes a qualitative leap with dual camera with AI capable of recognising up to 180 different obstacles. It identifies pets, curtains and other household elements, adjusting its behaviour accordingly. It includes a front LED for night vision and allows remote access to the camera from the app, something useful for surveillance or simply to check what the robot is doing in real time. For homes with young children or pets, this function can be very practical.
Autonomy and Battery
All three robots share a 5,200 mAh battery. The Dreame L10s Ultra Gen 2 declares 240 minutes of autonomy, whilst the L40s Pro Ultra reaches 220 minutes. The Dreame D20 does not specify autonomy in minutes, although having a larger dust bin (700 ml versus 300 ml) and not having an auto-emptying base, it may require more frequent manual emptying in large homes.
In practice, the L10s Ultra Gen 2 and the L40s Pro Ultra can cover large surfaces without intervention thanks to auto-emptying at the base. The D20 will need you to empty the bin manually, which can be an inconvenience if you have more than 100 m² or pets that shed a lot of hair.
Smart Functions
All three robots can overcome obstacles of 20 mm in height. The Dreame L40s Pro Ultra adds the ability to climb simple steps, although the table does not detail the exact height. All are compatible with Alexa and Google Home, but only the L40s Pro Ultra includes its own voice assistant integrated into the robot, which allows you to give it commands directly without needing to use your mobile or external speakers.
Multifunction Cleaning Base
The Dreame D20 does not have a multifunction base. It is a simple charging base, without auto-emptying, mop washing or mop drying. The user must take care of emptying the dust bin and cleaning the mop manually.
The Dreame L10s Ultra Gen 2 incorporates a complete multifunction base: auto-emptying of the dust bin into a 3.2-litre bag, mop washing with hot water and drying with hot air. The clean and dirty water tanks have a capacity of 4.5 and 4 litres respectively. It includes a detergent tank and an optional plumbing connection kit, which is purchased separately.
The Dreame L40s Pro Ultra maintains the same multifunction base capabilities as the L10s Ultra Gen 2, but adds third-generation self-cleaning of the washing tray, which reduces manual maintenance. It also allows automatic removal of the mops if you only want to vacuum, something that the L10s Ultra Gen 2 does not offer.
Dimensions
The diameter of all three robots is 350 mm. The height varies slightly: the Dreame D20 measures 96.8 mm, the L10s Ultra Gen 2 reaches 97 mm and the L40s Pro Ultra reaches 103.8 mm. These extra millimetres can make a difference if you have low furniture or sofas with little clearance. The D20 and the L10s Ultra Gen 2 fit better under furniture with tight heights.
The base dimensions are very different. The Dreame D20 has a compact base of 126 mm wide, 92.6 mm high and 130 mm deep. The L10s Ultra Gen 2 and the L40s Pro Ultra share a multifunction base with measurements of 340 mm wide, 590.5 mm high and 456.7 mm deep. This should be taken into account if space is limited.
Real-World Experience
The Dreame D20 can work well in small or medium-sized flats where vacuuming is the priority and emptying the bin manually does not matter. Its 700 ml bin in the robot is more generous than that of the other two models, which reduces emptying frequency if you do not have an auto-emptying base. Mopping with a static mop is basic, designed more for maintenance than for deep cleaning.
The Dreame L10s Ultra Gen 2 is balanced for medium or large-sized homes where complete mopping automation is sought. The multifunction base with mop washing and drying with hot water and air guarantees a good level of hygiene without manual intervention. Pet recognition and 10,000 Pa power are sufficient for most situations, although it may fall short on thick carpets or if there is a lot of hair.
The Dreame L40s Pro Ultra is designed for those seeking maximum automation and adaptability. Dirt detection on floor and mops, automatic removal of mops to switch to vacuum-only mode, extendable and liftable side brush, and 19,000 Pa of power make it a very complete option for large homes, with pets or with demanding cleaning needs. The dual camera with AI and remote access add an extra level of control and peace of mind.
Conclusion: Which One to Choose?
Choose the Dreame D20 if you are looking for a robot focused on vacuuming, you have a small or medium-sized flat, you do not mind emptying the bin manually and you prefer a compact base that takes up little space. Also if the budget is tight and you do not need automatic mopping.
Choose the Dreame L10s Ultra Gen 2 if you want to automate both vacuuming and mopping without reaching the price of the top range. It is a solid option for medium or large-sized homes, with pets, where mop washing and drying with hot water and air makes the difference compared to more basic solutions. The relationship between features and price is usually good in this model.
Choose the Dreame L40s Pro Ultra if you are looking for the best robot vacuum of 2025 within the Dreame range, with maximum suction power, intelligent dirt detection, liftable and extendable brushes, and total control thanks to the dual camera with AI. It is the right option for large homes, with pets, carpets or demanding cleaning needs. Also if you value functions such as remote access to the camera or the integrated voice assistant.
