Introduction
The DJI Romo P (Robot and Transparent Base) and the Dreame L40s Pro Ultra represent two high-end propositions launched in 2025 that compete directly in the premium segment of robot vacuum cleaners with multifunctional bases. DJI, known worldwide for its drones, makes the leap into the domestic cleaning market with a model that boasts exceptional suction power of 25000 Pa, whilst Dreame, a manufacturer with extensive experience in the sector, opts for a balance between advanced features and extended autonomy with its L40s Pro Ultra.
Both units are designed for demanding homes where total automation is sought: they vacuum, mop, wash the mop pads with hot water and dry them to prevent bad odours. The choice between one or the other will depend on specific priorities such as raw suction power, battery autonomy or technical details in the mopping and navigation system.
Power and Suction
The most notable difference in this section is marked by the DJI Romo P with its 25000 Pa of suction power, a figure that widely exceeds the Dreame L40s Pro Ultra's 19000 Pa. This advantage of the DJI model translates into greater capacity to extract embedded dirt from carpets or absorb heavy particles in a single pass.
Regarding the brushing system, the DJI is equipped with a Dividid type main brush whilst the Dreame mounts a double anti-tangle brush. Both models incorporate anti-tangle main brushes already installed and with lifting capability during mopping, which prevents them from getting wet when you only want to use the mop.
Where a practical difference appears is in the side brush: the Dreame L40s Pro Ultra's lifts during mopping, a function that the DJI does not have. This allows the Dreame to prevent the side brush from interfering with the wet mop pads. Both robots have an extendable side brush to better reach corners, although the DJI boasts a double anti-tangle system in this component.
Mopping
Both units use a system of two rotating mop pads that extend to reach the edges of walls. The Dreame specifies that its extension is 3.0 with Roboswing technology, which allows the robot to make a lateral movement to get the mop under furniture or ledges. The DJI also has mop extension but does not detail this additional feature.
Mop lifting is present in both models, although the Dreame specifies that it reaches 10.5 mm in height, sufficient to pass over thin carpets without wetting them. The DJI confirms the function without providing an exact measurement.
In mop washing, the Dreame L40s Pro Ultra stands out by specifying a temperature of 75°C, whilst the DJI indicates washing with hot water without specifying degrees. Both bases automatically wash the mop pads during cleaning and upon completion. Drying also uses hot air in both cases: the Dreame at 45°C and the DJI without a specific temperature.
The Dreame allows leaving the mop pads in the base when you only want to vacuum, a function that the DJI does not have confirmed. Both robots detect dirt both on the mop pads and on the floor, adjusting the mopping intensity as necessary.
Navigation System
The DJI Romo P incorporates a solid-state LiDAR, whilst the Dreame L40s Pro Ultra mounts a Lidar 3D turret. Both systems allow precise mapping and creation of efficient routes, although the DJI's solid-state technology is usually more compact.
In artificial intelligence, the Dreame is equipped with a dual camera compared to the DJI's single camera. This difference is noticeable in obstacle recognition: the Dreame identifies up to 180 different types, a figure that the DJI does not specify. The Dreame model also recognises pets and detects curtains to adjust its behaviour, functions that are not confirmed in the DJI.
Both robots have a front 3D laser sensor, remote camera access and LED for night vision. Both incorporate intelligent cleaning systems with AI and stain recognition to reinforce cleaning in specific areas. The Dreame specifies its CleanGenius technology to manage these processes.
Autonomy and Battery
The Dreame L40s Pro Ultra has a 5200 mAh battery that provides it with 220 minutes of autonomy, compared to the DJI Romo P's 5000 mAh and 180 minutes. This 40-minute difference can be decisive in large homes where the robot needs to complete long cycles without returning to charge.
In practice, those extra 40 minutes of the Dreame can mean cleaning one or two additional rooms in a single session. For homes of more than 150 square metres with various cleaning levels (vacuuming and intensive mopping), the Dreame's autonomy offers more margin.
Intelligent Functions
The ability to overcome obstacles shows a clear advantage of the Dreame L40s Pro Ultra, which reaches between 22 and 40 mm with its extra system, compared to the DJI Romo P's 20 mm. This difference allows the Dreame to overcome thicker carpets, grouped cables or small level differences between rooms without getting blocked.
The Dreame incorporates a simple voice assistant, a function that the DJI does not have confirmed. Neither of the two models includes a robotic arm to manipulate objects.
Multifunctional Cleaning Base
Both bases perform self-cleaning of the washing tray, although with different technologies. The DJI uses a system with a water nozzle whilst the Dreame boasts a third generation of self-cleaning. This function is fundamental to prevent accumulation of dirt and bad odours in the base itself.
The DJI Romo P incorporates UV disinfection in the base, something that the Dreame L40s Pro Ultra does not offer. This technology helps eliminate bacteria in the washing system. Regarding detergent, the DJI is equipped with a double tank compared to the Dreame's single tank, which allows using two types of product depending on the type of floor or cleaning need.
The dust bag capacity is greater in the Dreame: 3.2 litres compared to the DJI's 2.4. The water tanks also favour the Dreame, with 4.5 litres of clean water and 4 litres of dirty water, whilst the DJI offers 4 and 3.2 litres respectively. These differences mean fewer emptyings and fillings in the Dreame model.
The Dreame includes an optional kit for connection to plumbing, which is purchased separately. The DJI does not offer this possibility. Neither of them comes with the connection integrated as standard.
Dimensions
The DJI Romo P measures 98 mm in height compared to the Dreame L40s Pro Ultra's 103.8 mm. Those almost 6 millimetres of difference can determine whether the DJI accesses under furniture or beds where the Dreame cannot reach. The diameter is practically identical: 351 mm in the DJI and 350 mm in the Dreame.
The bases present very different dimensions. The DJI's is wider (453 mm compared to 340 mm) but less tall (440 mm compared to 590.5 mm). The depth also varies: 425 mm in the DJI and 456.7 mm in the Dreame. It is advisable to measure the available space before deciding, as the Dreame's base is more vertical whilst the DJI's occupies more horizontal surface.
Real-World Experience
For large homes of more than 200 square metres, the Dreame L40s Pro Ultra offers an advantage due to its greater autonomy and superior capacity in the base tanks, which reduces interruptions and maintenance. Its ability to overcome obstacles of up to 40 mm is also useful in houses with thick carpets or small steps.
If the priority is maximum suction power, the DJI Romo P with its 25000 Pa stands out clearly. This feature especially benefits homes with long-haired pets or high-pile carpets where deep extraction is needed. Its lower height also makes it more versatile for passing under low furniture.
The Dreame's navigation system, with recognition of up to 180 obstacles and curtain detection, provides greater precision in houses with many objects on the floor or complex decoration. The Dreame's dual camera reinforces this identification capability.
The DJI's double detergent tank allows alternating between specific products for different types of flooring without needing to constantly empty and refill. The UV disinfection of its base adds a hygiene bonus that can be valued in homes with small children or allergy sufferers.
Conclusion: Which to Choose?
Choose the DJI Romo P (Robot and Transparent Base) if... you are looking for the maximum suction power available on the market, you need the robot to pass under very low furniture thanks to its 98 mm height, you value UV disinfection in the base or you want to manage two different types of detergent without complications. It is ideal for those who prioritise raw vacuuming power and have horizontal space for a wider base.
Choose the Dreame L40s Pro Ultra if... you live in a large house where the 220-minute autonomy makes a difference, you need to overcome obstacles of more than 20 mm frequently, you prefer higher capacity tanks to reduce maintenance or you value a navigation system with broad obstacle recognition and curtain detection. Its liftable side brush during mopping and the washing of mop pads at 75°C are also strong points. It is especially recommended for spacious homes with thick carpets and complex decoration where advanced intelligent navigation provides real value.
