38% OFF
$799.99
$1299.99
Updated November 2026
Data from the official Roborock site.
2026 verdict
The Roborock Saros 20 Flow is the stronger robot vacuum and mop of the two, with 36,000 Pa of suction against 25,000 Pa and a 301 minute runtime against 188.
Its dock also doses detergent automatically and recharges the robot in about 2.5 hours against 4 hours for the Roborock Qrevo Edge 2. The Roborock Qrevo Edge 2 is the lower priced of the pair, stands 79.8 mm tall against 89.8 mm and is the one that publishes its water tank (4 L) and onboard bin (240 ml), which Roborock leaves out for the Flow. Both work with Alexa, Google Home, Apple Home, SmartThings, Home Assistant and Matter on 2.4 GHz Wi-Fi only. Choose the Roborock Saros 20 Flow for pet hair, carpet and long runs, and the Roborock Qrevo Edge 2 for very low furniture and known tank sizes.
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The biggest differences
Where these two are furthest apart, and by how much.
- Battery Life+60%Roborock Saros 20 Flow301 minutes vs 188 minutes
- Suction Power+44%Roborock Saros 20 Flow36000Pa vs 25000Pa
| Feature | Roborock Qrevo Edge 2 | Roborock Saros 20 Flow | Winner |
|---|---|---|---|
| Price | $799.99 | $1699.99 | Roborock Qrevo Edge 2 |
| Rating | 3.9 | 4.2 | Roborock Saros 20 Flow |
| Battery Life | 188 minutes | 301 minutes | Roborock Saros 20 Flow |
| Suction Power | 25000Pa | 36000Pa | Roborock Saros 20 Flow |
| Warranty | 1 year | 1 year | Tie |
| Auto Recharge | YES | YES | Tie |
| Connectivity | 2.4 GHz WiFi, Bluetooth | 2.4 GHz WiFi | Tie |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Tie |
| Navigation Type | Laser (LiDAR) | Laser (LiDAR) | Tie |
| Obstacle Detection | YES | YES | Tie |
| Cliff Detection | YES | YES | Tie |
| Multi-Room Mapping | YES | YES | Tie |
What the differences mean
Suction
The Roborock Saros 20 Flow is rated at 36,000 Pa and the Roborock Qrevo Edge 2 at 25,000 Pa. It is the widest gap in the pair and the one that matters on embedded pet hair and rugs.
Clearance under furniture
The Roborock Qrevo Edge 2 stands 79.8 mm tall and the Roborock Saros 20 Flow 89.8 mm. Ten millimetres is enough to separate a sofa or bed frame the Edge slides under from one the Flow stops at.
Runtime
The Roborock Saros 20 Flow is rated at up to 301 minutes and the Roborock Qrevo Edge 2 at 188 minutes. The slim Edge gives up battery for its low body, so the Flow covers far more floor per charge.
Dock detergent and charging
The Roborock Saros 20 Flow dock dispenses cleaning solution automatically, and the robot recharges in about 2.5 hours. The Roborock Qrevo Edge 2 dock has no automatic detergent dispenser and its robot takes about 4 hours.
Figures Roborock does not publish
For the Roborock Saros 20 Flow the water tank and the onboard and dock bin sizes are not documented. The Roborock Qrevo Edge 2 lists a 4 L tank and a 240 ml onboard bin, so its capacity is known and the Flow's is a gap in the data rather than a weakness. Noise is documented for both, 66.6 dB for the Flow and 64.6 dB for the Edge, a gap you would not hear.
Which one to buy if
- you have shedding pets or rugs
The Roborock Saros 20 Flow is rated at 36,000 Pa, against 25,000 Pa for the Roborock Qrevo Edge 2.
- your furniture sits very low
At 79.8 mm the Roborock Qrevo Edge 2 gets under pieces that stop the 89.8 mm Roborock Saros 20 Flow.
- you want the dock to handle detergent
Only the Roborock Saros 20 Flow dock dispenses cleaning solution on its own.
- you want to know the tank and bin sizes before you buy
The Roborock Qrevo Edge 2 publishes a 4 L tank and a 240 ml onboard bin, while the Roborock Saros 20 Flow publishes neither.
- you want the longest run per charge
The Roborock Saros 20 Flow is rated at up to 301 minutes, against 188 for the Roborock Qrevo Edge 2.
38% OFF
$799.99
$1299.99
- + Price: $799.99
- - Rating: 3.9 vs 4.2
- - Battery Life: 188 minutes vs 301 minutes
Winner
$1699.99
- + Rating: 4.2
- + Battery Life: 301 minutes
- + Suction Power: 36000Pa
- - Price: $1699.99 vs $799.99
Frequently Asked Questions
Which is better overall: Roborock Qrevo Edge 2 or Roborock Saros 20 Flow?
The Roborock Saros 20 Flow, for its 36,000 Pa of suction, longer runtime, faster recharge and automatic detergent dosing. The Roborock Qrevo Edge 2 is the lower priced one and the better pick for very low furniture.
What is the difference between the Roborock Qrevo Edge 2 and the Roborock Saros 20 Flow?
Suction and height. The Roborock Saros 20 Flow is rated at 36,000 Pa and stands 89.8 mm tall, while the Roborock Qrevo Edge 2 is rated at 25,000 Pa and stands 79.8 mm.
Do the Roborock Qrevo Edge 2 and the Roborock Saros 20 Flow work with Apple Home and Matter?
Yes, both list Apple Home, SmartThings, Home Assistant and Matter, along with Alexa and Google Home. Both connect over 2.4 GHz Wi-Fi only.
What is the battery life of the Roborock Saros 20 Flow compared with the Roborock Qrevo Edge 2?
The Roborock Saros 20 Flow is rated at up to 301 minutes, against 188 minutes for the Roborock Qrevo Edge 2. The Flow also recharges in about 2.5 hours against 4 hours for the Edge.
Who should buy the Roborock Qrevo Edge 2?
Buyers with low sofas and beds who want a slim robot with published tank and bin sizes and a lower price than the Flow.
Who should buy the Roborock Saros 20 Flow?
Pet owners and homes with rugs who want the strongest suction and a dock that handles detergent, and who accept that some capacity figures are unpublished.
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