Introduction
The Roborock Qrevo Edge 2 and the Roborock Saros Z70 represent the most advanced technology from the world's leading brand in robot vacuum cleaners. We're looking at two high-end devices with complete multifunctional bases, designed for users seeking total automation in home cleaning. Both models incorporate mopping systems with extendable rotating mops, hot water washing and hot air drying, as well as intelligent navigation with camera and 3D laser sensors.
The main difference between these robots lies in their technological approach: the Saros Z70 includes an OmniGrip robotic arm capable of manipulating objects, whilst the Qrevo Edge 2 focuses on greater suction power and obstacle recognition capability. Both are designed for large homes with demanding cleaning requirements.
Power and Suction
The Roborock Qrevo Edge 2 delivers 25,000 Pa of suction power, exceeding the Saros Z70's 22,000 Pa. This 3,000 Pa difference can be particularly noticeable on thick carpets or when there are pets that shed a lot of hair. In practice, both values represent very high power levels within the current market.
The brushing system shows interesting differences. The Qrevo Edge 2 features the DuoDivide Antienredos brush, designed to push hairs towards the central suction gap and minimise tangles. The Saros Z70 has a conventional anti-tangle brush but adds the ability to lift the side brush during mopping, something the Qrevo Edge 2 cannot do. This prevents the side brush from interfering with the mops or staining already mopped areas.
Both robots lift the main brush when mopping and have an extendable, anti-tangle side brush. For homes with long-haired pets, the Qrevo Edge 2's DuoDivide system combined with its greater power may prove more effective.
Mopping
Both models incorporate a dual rotating mop system with extension to better reach edges and skirting boards. Mop lifting works differently: the Qrevo Edge 2 lifts up to 12 mm, whilst the Saros Z70 reaches between 12 and 22 mm depending on the situation. This greater lifting capacity allows the Saros Z70 to overcome higher obstacles without wetting the mops where it shouldn't.
Both mop with warm water, wash the mops with hot water in the base and dry them with hot air to prevent bad odours. Both bases feature 2.0 self-cleaning of the washing tray. During cleaning, both robots detect dirt on both the mops and the floor, returning to the base to wash the mops when necessary and re-scrubbing particularly dirty areas.
The notable difference is that the Saros Z70 incorporates a detergent tank in the base, dispensing it during mop washing for deeper cleaning. The Qrevo Edge 2 doesn't include this function, working solely with water. For homes requiring additional disinfection or cleaning of difficult stains, the detergent tank makes a difference.
Navigation System
The navigation section shows different approaches. The Qrevo Edge 2 uses retractable LiDAR and AI camera, with the ability to recognise up to 280 different types of obstacles. The Saros Z70 opts for the StarSight 2.0 system with dual AI camera and 3D laser sensors, identifying 108 obstacles.
Although the number of recognised obstacles is greater in the Qrevo Edge 2, the Saros Z70's dual camera system provides more precise spatial perception. Both recognise pets, have LED for night vision and allow remote camera access from the mobile.
The Qrevo Edge 2 adds specific curtain detection, avoiding them during cleaning to prevent wetting or tangling. This function isn't present in the Saros Z70. The Qrevo Edge 2 integrates SmartPlan 3.0 for intelligent route planning, whilst the Saros Z70 works with SmartPlan 2.0 and the RR Mason 12.0 algorithm.
Autonomy and Battery
The Saros Z70's battery has greater capacity: 6,400 mAh compared to the Qrevo Edge 2's 5,200 mAh. However, the Qrevo Edge 2 offers 188 minutes of declared autonomy. The Saros Z70's autonomy data isn't available, although its greater battery capacity suggests extended operating times.
In very large homes, the Saros Z70's greater capacity may translate into fewer interruptions for recharging. The Qrevo Edge 2, with its 188 minutes, covers large surfaces without problem. It's worth remembering that these robots automatically return to the base when they need recharging and continue cleaning afterwards.
Smart Functions
The Roborock Saros Z70 incorporates the OmniGrip Arm robotic arm, capable of manipulating small objects to move them out of the way during cleaning. This function represents a significant innovation that the Qrevo Edge 2 doesn't offer. For homes with young children where toys or objects are often scattered about, the robotic arm can prove especially useful.
The Qrevo Edge 2 overcomes steps up to 20 mm in height. The Saros Z70 also overcomes simple steps, although the exact specification isn't detailed. Both robots include their own voice assistant as well as compatibility with Alexa and Google Home.
Multifunctional Cleaning Base
The multifunctional bases of both models are very comprehensive. They perform auto-emptying of the dust bin, hot water mop washing, hot air drying and 2.0 self-cleaning of the tray. They also automatically remove the mops when the robot is only going to vacuum.
The Qrevo Edge 2's dust bag has a 2.7-litre capacity, slightly larger than the Saros Z70's 2.5 litres. Both capacities allow several weeks without changing the bag in normal use. The clean water tanks are identical at 4 litres, whilst the dirty water tank is larger in the Qrevo Edge 2: 3.5 litres compared to 3 litres.
As already mentioned, only the Saros Z70 has an integrated detergent tank in the base. Neither offers connection to water pipes, not even via an optional kit. Neither includes UV disinfection of the base.
Dimensions
The robots are practically the same size: 352 mm diameter for the Qrevo Edge 2 and 353 mm for the Saros Z70. The height is identical in both: 79.8 mm. This measurement allows them to slide under most standard furniture and beds without problem.
The bases show more notable differences. The Qrevo Edge 2's measures 340 mm wide, 521 mm high and 487 mm deep. The Saros Z70's base is wider at 381 mm, but less tall (488 mm) and slightly less deep (475 mm). Ultimately, both occupy considerable space, as is usual with complete multifunctional bases. The Qrevo Edge 2's base is narrower but taller, whilst the Saros Z70's is wider and lower.
Real-World Usage Experience
For large homes, both robots offer sufficient capability. The Qrevo Edge 2 provides greater suction power and declared autonomy of 188 minutes, whilst the Saros Z70 compensates with greater battery capacity and the robotic arm for managing obstacles.
In homes with pets, the Qrevo Edge 2's DuoDivide brush combined with its 25,000 Pa of suction proves especially effective against hair. The Saros Z70, with 22,000 Pa and conventional anti-tangle brush, also performs well although with slightly less raw power.
For families with young children where toys or objects are often left on the floor, the Saros Z70's robotic arm provides a clear advantage that the Qrevo Edge 2 cannot offer. Conversely, if there are long curtains that reach the floor, the Qrevo Edge 2 specifically detects them to avoid them.
Maintenance is similar in both cases thanks to the multifunctional bases. The presence of a detergent tank in the Saros Z70 adds one more maintenance step (refilling the detergent), but also provides deeper cleaning of the mops.
Conclusion: Which to Choose?
Choose the Roborock Qrevo Edge 2 if... you're looking for the maximum available suction power, you have pets that shed a lot of hair, you need broad obstacle recognition (280 types), there are curtains that might interfere with cleaning, you prefer a narrower base even if it's taller, or you value having greater capacity in the dust bag and dirty water tank.
Choose the Roborock Saros Z70 if... you want the innovation of the robotic arm for manipulating small objects, you live in a home with children where toys are often scattered about, you prefer a navigation system with dual camera and StarSight 2.0, you need greater mop lifting (up to 22 mm), you value having an integrated detergent tank for deeper cleaning, or you're looking for greater battery capacity even if the base is somewhat wider.
Both represent the best of Roborock in 2025-2026. The Qrevo Edge 2 stands out for raw power and exhaustive recognition capability, whilst the Saros Z70 focuses on functional innovation with the robotic arm. For large homes with pets and the need for maximum power, the Qrevo Edge 2 is more suitable. If you prioritise automatic obstacle management and cleaning with detergent, the Saros Z70 offers functions that no other robot in the comparison has.
