Introduction
Choosing between high-end robots can be tricky when all three models share world-leading manufacturers. The Dreame L50s Pro Ultra arrives in 2026 as Dreame's latest offering, whilst the Roborock Qrevo Edge 2 launches in May of that same year and the Roborock Saros Z70 appeared in 2025. All three represent the most advanced autonomous cleaning technology, albeit with different approaches.
We're looking at robots with complete multifunctional bases: auto-emptying, mop washing and drying. The Dreame stands out for its raw power of 30,000 Pa, whilst the Roborocks opt for more balanced solutions with 25,000 and 22,000 Pa respectively. The Saros Z70 incorporates an OmniGrip robotic arm that makes notable differences in versatility.
Key Differences at a Glance
- The Dreame L50s Pro Ultra reaches 30,000 Pa of suction versus 25,000 for the Qrevo Edge 2 and 22,000 for the Saros Z70
- Only the Saros Z70 integrates an OmniGrip robotic arm to manipulate objects
- The Dreame measures 103.8 mm in height; the Roborocks barely 79.8 mm
- The Qrevo Edge 2 recognises up to 280 obstacles, compared to 220 for the Dreame and 108 for the Saros
- The Dreame includes a detergent tank in the base; the Qrevo Edge 2 doesn't have it
- The Saros Z70 battery is 6,400 mAh, superior to the 5,200 mAh of the other two
- Only the Qrevo Edge 2 and Saros Z70 mop with warm water
Power and Suction
The most obvious difference appears in suction power. The Dreame L50s Pro Ultra leads with 30,000 Pa, a figure that exceeds the Qrevo Edge 2 by 5,000 Pa and the Saros Z70 by 8,000 Pa. In practice, this translates to greater capacity to extract ingrained dirt from carpets or vacuum heavy particles.
The brushing system shows different philosophies. The Dreame opts for a dual brush, whilst the Qrevo Edge 2 uses Roborock's DuoDivide anti-tangle system, designed to push hair towards the centre and prevent tangles. The Saros Z70 mounts a conventional anti-tangle brush. All three raise the main brush during mopping to avoid dirtying the mops.
Regarding side brushes, the Dreame and Saros Z70 can raise them when mopping, something the Qrevo Edge 2 doesn't do. All three models feature an extendable side brush to improve corner cleaning, and all incorporate anti-tangle design in this component.
Mopping
All three robots mop with two rotating mops that extend to reach edges. The Dreame also includes the Roboswing system, which makes lateral movements to get the mop under furniture and overhangs. Mop lifting varies: the Dreame raises up to 10.5 mm, whilst the Qrevo Edge 2 reaches 12 mm and the Saros Z70 goes up to 22 mm at its maximum range.
An important difference is in the mopping water temperature. The Dreame uses cold water, whilst the Qrevo Edge 2 and Saros Z70 mop with warm water, which helps to better dissolve grease and adhered dirt.
In the base, all three wash the mops with hot water and dry them with hot air, guaranteeing hygiene and preventing bad odours. The Dreame boasts third-generation tray self-cleaning, compared to version 2.0 on the Roborocks. All three detect dirt both on the mops and on the floor, adjusting the cleaning process as needed. Additionally, all can automatically detach the mops at the base when only vacuuming is required.
Navigation System
The Dreame mounts a traditional LiDAR turret, visible on top, which explains its greater height. The Qrevo Edge 2 incorporates retractable LiDAR, considerably reducing the robot's profile. The Saros Z70 uses Roborock's StarSight 2.0 system.
Obstacle recognition capacity marks notable differences. The Qrevo Edge 2 identifies up to 280 different objects, the Dreame recognises 220 and the Saros Z70 remains at 108. All integrate an AI camera, although the Dreame and Saros Z70 mount dual cameras versus the single one on the Qrevo Edge 2.
The Dreame and Qrevo Edge 2 detect curtains to avoid tangles; the Saros Z70 doesn't include this specific function. All three recognise pets, allow remote camera access and feature LED for night vision. Each model incorporates its own intelligent cleaning system: CleanGenius on the Dreame and SmartPlan on both Roborocks.
Autonomy and Battery
The Saros Z70 stands out with a 6,400 mAh battery, notably superior to the 5,200 mAh of the Dreame and Qrevo Edge 2. We only know the autonomy of the Qrevo Edge 2: 188 minutes of continuous operation. This figure is useful for calculating that it can clean large homes in a single session without needing an intermediate recharge.
The Saros Z70's greater battery capacity suggests even more extended autonomy, although we don't have the specific figure. In any case, all three robots are designed to manage large surfaces without problems.
Smart Functions
The Saros Z70 incorporates the OmniGrip robotic arm, an exclusive function that allows it to manipulate small objects, move light obstacles or even interact with household elements. Neither the Dreame nor the Qrevo Edge 2 feature this technology.
Regarding obstacle climbing, the Qrevo Edge 2 specifies that it can overcome steps up to 20 mm. The Dreame and Saros Z70 indicate capacity to overcome simple steps, although without an exact figure. All three models integrate their own voice assistant and are compatible with Alexa and Google Home.
Multifunctional Cleaning Base
All three bases perform auto-emptying, washing with hot water and drying with hot air. The Dreame includes an integrated detergent tank in the base, something the Qrevo Edge 2 doesn't offer. The Saros Z70 does have this tank.
Dust bag capacity favours the Dreame with 3.2 litres, followed by the Qrevo Edge 2 with 2.7 litres and the Saros Z70 with 2.5 litres. In water tanks, the Dreame leads with 4.5 litres of clean water and 4 litres of dirty water. The Qrevo Edge 2 has 4 and 3.5 litres respectively, whilst the Saros Z70 matches the 4 litres of clean water but remains at 3 litres of dirty water.
The Dreame offers an optional kit for plumbing connection that is purchased separately, avoiding manually refilling and emptying tanks. Neither of the Roborocks includes this option.
Dimensions
Height is the most relevant factor. The Dreame measures 103.8 mm, which limits its access under low furniture. The Qrevo Edge 2 and Saros Z70 barely reach 79.8 mm, allowing them to slip under sofas, beds and wardrobes more easily.
The diameter is practically identical: 350 mm on the Dreame, 352 mm on the Qrevo Edge 2 and 353 mm on the Saros Z70. As for the bases, the Dreame is the most compact in width (340 mm same as the Qrevo Edge 2), but the tallest at 590 mm versus 521 mm for the Qrevo Edge 2 and 488 mm for the Saros Z70. The Saros Z70 is the widest at 381 mm.
Real-World Usage Experience
For large homes, the Saros Z70 offers the largest battery and can manage extensive surfaces with a single charge. The Dreame compensates with greater capacity in the dust bag and water tanks, reducing maintenance frequency.
If there are pets, the Dreame's 30,000 Pa power is advantageous for hair embedded in carpets. The Qrevo Edge 2's DuoDivide system also shows effectiveness against hair tangles. In homes with many obstacles, the Qrevo Edge 2 has an advantage with its recognition of 280 objects.
For getting under furniture, the Roborocks clearly win with their 79.8 mm height. The Dreame is limited by its visible LiDAR turret. The Saros Z70's robotic arm adds versatility in homes where small objects need moving before cleaning.
Warm mopping water on the Roborocks improves results in kitchens with grease. The detergent tank on the Dreame and Saros Z70 facilitates deeper mopping without manual intervention.
Conclusion: Which to Choose?
Choose the Dreame L50s Pro Ultra if you're looking for maximum available suction power, you have thick carpets or pets that shed a lot of hair, and you value having the largest tanks to minimise maintenance. Also if you want the option to connect to plumbing in the future. Height isn't a problem in your home.
Choose the Roborock Qrevo Edge 2 if you need a robot that passes under low furniture, you prioritise the most advanced obstacle recognition with 280 identifiable objects, and you prefer mopping with warm water. Ideal for homes with lots of furniture and varied obstacles where intelligent navigation makes the difference.
Choose the Roborock Saros Z70 if you want maximum autonomy thanks to its 6,400 mAh battery, you need the robotic arm to move small objects, and you're looking for a low-profile robot that reaches all corners. Perfect for large homes where the arm's versatility and mop lifting up to 22 mm provide real value. The detergent tank and warm water complete a very balanced package.
