Introduction
This comparison pits three high-end robots launched between 2024 and 2025 against each other. The Dreame D20 Pro Plus and the Dreame L40s Pro Ultra represent two very different propositions within the Chinese brand's catalogue, whilst the Roborock Qrevo Curv S5X arrives as an alternative from the world-leading firm in this segment.
The D20 Pro Plus is a model aimed at those seeking extreme autonomy and a more compact base. The L40s Pro Ultra opts for total automation with advanced artificial intelligence functions and mop care. The Qrevo Curv S5X positions itself as a balance between technical performance and proven reliability.
Power and Suction
The Dreame L40s Pro Ultra leads with 19,000 Pa of suction power, followed by the Roborock Qrevo Curv S5X with 18,500 Pa. The Dreame D20 Pro Plus remains at 13,000 Pa, a figure sufficient for most homes but clearly inferior when there are thick carpets or abundant pet hair.
All three models incorporate anti-tangle brushes. The D20 Pro Plus and the L40s Pro Ultra feature Dreame's Doble Cepillo HyperStream system, designed with two brushes anchored at one end that drastically reduce hair tangles. The Qrevo Curv S5X uses Roborock's DuoDivide Antienredos, which pushes hairs towards the central gap to facilitate suction.
A fundamental difference appears in brush lifting. The L40s Pro Ultra can lift both the main brush and the side brush during mopping, preventing them from getting wet and ensuring more hygienic mopping. The D20 Pro Plus and the Qrevo Curv S5X lack this function, which can result in damp brushes after each mopping session.
All three units feature an extendable side brush to improve corner cleaning, and all include anti-tangle technology on this brush.
Mopping
Here the differences are enormous. The Dreame D20 Pro Plus uses a static mop, without rotation or automatic washing. It doesn't have a multifunction base, which means you must wash the mops manually after each use. It also doesn't lift the mops nor does it have edge extension.
The Dreame L40s Pro Ultra and the Roborock Qrevo Curv S5X integrate two rotating mops and complete multifunction bases. Dreame's model washes the mops with hot water at 75°C and dries them with hot air, as well as including a third-generation tray self-cleaning system. The Qrevo Curv S5X also washes with hot water at 75°C and dries with hot air, with version 2.0 tray self-cleaning.
The L40s Pro Ultra extends its mops to reach edges and skirting boards through a system that combines physical extension with Roboswing movement, that characteristic wiggling of the robot that allows the mop to get under furniture overhangs. The Qrevo Curv S5X also extends mops but without Roboswing.
Mop lifting reaches 10.5 mm on the L40s Pro Ultra and 10 mm on the Qrevo Curv S5X, sufficient to climb over medium-thickness carpets without wetting them. The D20 Pro Plus doesn't lift mops.
The L40s Pro Ultra detects dirt both on the mops and on the floor, adjusting scrubbing automatically. It can remove the mops at the base when you only need to vacuum, something that neither the D20 Pro Plus nor the Qrevo Curv S5X offer. The Roborock also detects dirt on mops and floor, but doesn't remove the mops automatically.
Only the L40s Pro Ultra incorporates a detergent tank in the base, which dispenses product during mop washing.
Navigation System
All three robots use a LiDAR turret to map the home and navigate with precision. All feature obstacle avoidance, but the implementation varies considerably.
The Dreame L40s Pro Ultra stands out with dual AI camera capable of recognising 180 different types of obstacles, including pets and curtains. It allows remote access to the camera to monitor the home and features night vision LED. It integrates the CleanGenius AI-powered intelligent cleaning system.
The D20 Pro Plus and the Qrevo Curv S5X don't incorporate an AI camera. Dreame's more basic model does include a front 3D laser sensor, as does the L40s Pro Ultra. The Roborock dispenses with the front 3D sensor but compensates with its RR Mason 11.0 algorithm and SmartPlan intelligent cleaning technology.
In practice, the L40s Pro Ultra offers the most advanced navigation of the three, especially useful in homes with pets or many objects on the floor. The Qrevo Curv S5X relies on Roborock's accumulated experience to offer reliable navigation without the need for cameras.
Autonomy and Battery
All three robots feature 5,200 mAh batteries, but real autonomy differs notably. The Dreame D20 Pro Plus achieves 285 minutes of continuous operation, the highest figure in this comparison. The L40s Pro Ultra remains at 220 minutes, whilst the Roborock Qrevo Curv S5X offers 180 minutes.
This difference is explained by suction power and active systems. The D20 Pro Plus, with lower power and without advanced functions that consume extra energy, optimises autonomy. The L40s Pro Ultra and the Qrevo Curv S5X sacrifice battery minutes in exchange for greater power and more complex functions.
For large homes, the D20 Pro Plus has a clear advantage. For medium or large-sized flats requiring several passes over difficult stains, the other two models have sufficient autonomy.
Smart Functions
All three robots overcome obstacles of 20 mm in height, except the L40s Pro Ultra which can tackle simple steps thanks to a more advanced wheel and sensor management system.
The L40s Pro Ultra incorporates its own voice assistant in addition to compatibility with Alexa and Google Home. The D20 Pro Plus and the Qrevo Curv S5X only work with external assistants.
Multifunction Cleaning Base
The Dreame D20 Pro Plus only features auto-emptying of the dust container. Its bag is 5 litres, the most generous of the three, which reduces replacement frequency. It doesn't wash or dry mops because it lacks a multifunction base.
The Dreame L40s Pro Ultra integrates a complete multifunction base with mop washing with hot water at 75°C, hot air drying, third-generation tray self-cleaning and detergent tank. Its water tanks are 4.5 litres for clean water and 4 litres for dirty water. The dust bag is 3.2 litres. It includes an optional plumbing connection kit that is purchased separately.
The Roborock Qrevo Curv S5X also offers a multifunction base with hot water washing at 75°C, hot air drying and 2.0 tray self-cleaning. Its tanks are 4 litres of clean water and 3 litres of dirty water. The dust bag is the smallest, at 2.5 litres.
If you're looking for minimal maintenance in mopping, the L40s Pro Ultra is the most complete option. The Qrevo Curv S5X offers similar performance but with slightly tighter tanks and without a detergent tank.
Dimensions
The Dreame D20 Pro Plus measures 350 mm in diameter and 96.8 mm in height, being the lowest of the three. This height allows it to slip under furniture more easily. Its base measures 298 mm wide, 452 mm high and 440 mm deep, the most compact.
The Dreame L40s Pro Ultra has 350 mm diameter and 103.8 mm height, the tallest due to its more complex internal systems. Its base is considerably larger: 340 mm wide, 590.5 mm high and 456.7 mm deep. You need sufficient space to accommodate it.
The Roborock Qrevo Curv S5X measures 352 mm in diameter and 98 mm in height. Its base has a more square shape: 450 mm wide, 450 mm high and 450 mm deep.
For those with low furniture or limited space for the base, the D20 Pro Plus proves more versatile.
Real-World User Experience
The Dreame D20 Pro Plus works well in small or medium-sized homes where mopping isn't a priority. Its extreme autonomy allows it to cover large surfaces without intermediate recharges. The absence of a multifunction base requires manual mop washing, something acceptable if you don't mop daily. The robot's water tank is 350 ml, larger than the other two, which partially compensates for the lack of automatic refilling.
The Dreame L40s Pro Ultra is designed for those seeking total automation. The base takes care of washing and drying the mops, the robot removes the mops when only vacuuming, and the AI adjusts cleaning according to the type of dirt detected. Remote camera access adds surveillance functionality. In homes with pets, specific recognition and 19,000 Pa power make a difference. The robot's water tank is only 80 ml because the base constantly refills during mopping.
The Roborock Qrevo Curv S5X offers a solid balance: high power, complete multifunction base and the reliability of an established brand. It lacks an AI camera, but its navigation system works with precision. The base's tanks are generous and the 98 mm height allows it to access under most furniture. It's a safe option for those who value technical performance without needing surveillance functions.
Conclusion: Which to Choose?
Choose the Dreame D20 Pro Plus if you have a large home where autonomy is critical, if you don't need intensive mopping or are willing to wash the mops manually, and if you're looking for a robot that can slip under low furniture without problems. Also if you value a compact base that doesn't take up too much space.
Choose the Dreame L40s Pro Ultra if you want to completely forget about mop maintenance, if you have pets and need specific camera recognition, if you value the ability to monitor your home remotely, or if you're looking for the maximum power and automation available. Ideal for homes where mopping is frequent and advanced obstacle detection is needed.
Choose the Roborock Qrevo Curv S5X if you prefer the proven reliability of the world-leading brand, if you're looking for a balance between power, advanced mopping and price without needing an AI camera, or if you value the user experience offered by the Roborock app. A good option for those seeking high-end performance without paying for surveillance functions they may not use.
