# Eufy Omni S2 vs Roborock Saros 20 Flow

As of Oct 31, 2026, the Eufy Omni S2 costs $1,600 and the Roborock Saros 20 Flow costs $1,700, so the Eufy Omni S2 is $100 cheaper. The Roborock Saros 20 Flow scores higher in our ranking (6.4 vs 5.6 out of 10). Pick the Eufy Omni S2 for cluttered homes with carpet and pets. Pick the Roborock Saros 20 Flow for hard floor homes with tall thresholds.

Prices checked Oct 31, 2026. HTML version: https://robotsforthat.com/vs/eufy-omni-s2-vs-roborock-saros-20-flow/

## Side by side

| | Eufy Omni S2 | Roborock Saros 20 Flow |
|---|---|---|
| Price | $1,600 | $1,700 |
| 3 year cost | $2,080 | $1,777 |
| Our score | 5.6/10 | 6.4/10 |
| Rank in Floors | #41 | #30 |
| Status | on sale | on sale |
| Warranty | n/a | 1 year (Roborock US store) |
| Suction | 30,000 Pa (brand claim), AeroTurbo 2.0 | 36,000 Pa claimed (Roborock); House Digest could not verify it but estimated floors came out about 90% clean |
| Navigation | CleanMind AI with 3D MatrixEye 2.0 (ToF sensors plus camera), 3D mapping | Retractable LiDAR (RetractSense) that lowers under furniture, plus VertiBeam side structured light (Roborock) |
| Obstacle avoidance | Detects obstacles over 1 cm and 200+ object types (brand claim); Vacuum Wars scored a perfect 24 of 24 | Reactive AI with structured light and RGB camera, 300+ object types, objects down to 3 cm wide and 3 cm tall (Roborock); House Digest saw it get lost once |
| Mopping | Yes, HydroJet 2.0 self cleaning roller mop, 15 N pressure, extends to edges and lifts 28 mm on carpet | SpiraFlow 2.0 roller mop, up to 240 rpm, 15 N pressure, 16 pressurized outlets, extends up to 44 mm for edges and lifts up to 15 mm on carpet (Roborock) |
| Self empty | Yes, auto empties into a 2.5 L bag rated for up to 68 days | Yes, auto empty into a bag, up to 65 days without manual emptying (Roborock); bag size not listed |
| Dock features | UniClean station washes the roller at 140°F, dries at 131°F, doses detergent, auto refill and drain options, plus a fragrance diffuser; 3 L clean and 2 L dirty tanks | Roller wash with water up to 212°F, 145°F warm air drying, auto detergent dosing, warm water refill of the robot tank (Roborock) |
| Runtime | Up to 180 min (TechRadar); Vacuum Wars estimated about 1,088 sq ft per charge | Not listed in minutes; Roborock says up to 200 m² per charge in standard vacuum and mop mode, 6,400 mAh battery, 150 min full charge |
| Dustbin | Onboard bin size not published; dock bag 2.5 L | n/a |
| Height | 3.4 in (85 mm) per TechRadar | 3.54 in robot height (Roborock landing page); the store page lists 89.8 mm |
| Pet hair | Vacuum Wars measured 88.5% flattened pet hair pickup and 0% hair wrap with DuoSpiral brushes | House Digest said heavy pet fur left no hair balls on the dual anti tangle brushes |
| App | Eufy app with Siri, Alexa, Google Home and Matter support | Roborock app; works with Alexa, Siri, Google Home and Matter; built in Hello Rocky voice assistant (Roborock) |
| Threshold | Up to 1.65 in double and 1.38 in single thresholds (brand claim); Vacuum Wars cleared 32 mm on 1 of 3 tries | Double layer thresholds up to 3.46 in (88 mm) with AdaptiLift Traverse 3.0 (Roborock); House Digest saw it clear a baby gate with a thud |
| Noise | n/a | No dB figure from Roborock or the reviews we read; House Digest says Carpet Boost is the loudest mode |
| Best for | cluttered homes with carpet and pets | hard floor homes with tall thresholds |
| Skip if | you need strong stain removal | you are on a budget or need spotless corners |

## What reviewers found

### Eufy Omni S2

- Vacuum Wars (3.91/5): 87% carpet sand removal (S1 managed 61%), 88.5% flattened pet hair, 0% hair wrap and a perfect 24 of 24 obstacles; dried stain mopping and navigation speed were below average. [Source](https://vacuumwars.com/eufy-s2-review/)
- TechRadar: Much better vacuuming than the Omni S1 with strong mopping and reliable navigation; about 55 dB in Quiet mode and 70 dB in Cyclone mode; one unit developed a connection fault and was replaced. Rated 5/5 design, 4.5/5 performance and 3.5/5 value, with no single overall score. [Source](https://www.techradar.com/home/robot-vacuums/eufy-omni-s2-review)
- Android Authority: Called it one of the best robot vacuums the reviewer has tested, with zero collisions and no hair tangles, but noticeably louder than other recent flagships. [Source](https://www.androidauthority.com/anker-eufy-robot-vacuum-omni-s2-review-3641831)

### Roborock Saros 20 Flow

- House Digest (9/10): Floors came out about 90% clean with some crumbs left in corners. Mopping fully removed ketchup and barbecue sauce and left wood almost dry. It cleared a baby gate but got lost once and had underwhelming edge cleaning. [Source](https://www.housedigest.com/2284562/roborock-saros-20-flow-review/)
- EFTM (92%): Australian review gave vacuuming 93%, mopping 93%, app 92% and features 93%. It cleaned dried jam and tomato sauce, needed two passes for Vegemite and struggled with crumbs near cabinets. Charging was slow. [Source](https://eftm.com/2026/09/review-roborock-saros-20-flow-thge-best-all-rounder-281056)

## Questions buyers ask

### Which is better, the Eufy Omni S2 or the Roborock Saros 20 Flow?

The Roborock Saros 20 Flow scores higher in our ranking (6.4 vs 5.6 out of 10). Pick the Eufy Omni S2 for cluttered homes with carpet and pets. Pick the Roborock Saros 20 Flow for hard floor homes with tall thresholds.

### Which is cheaper?

The Eufy Omni S2 at $1,600, versus $1,700 for the Roborock Saros 20 Flow, checked Oct 31, 2026. Over 3 years with running costs: $2,080 vs $1,777.

### What is the difference between the Omni S2 and the Saros 20 Flow?

Suction: 30,000 Pa (brand claim), AeroTurbo 2.0 on the Omni S2, 36,000 Pa claimed (Roborock); House Digest could not verify it but estimated floors came… on the Saros 20 Flow. Navigation: CleanMind AI with 3D MatrixEye 2.0 (ToF sensors plus camera), 3D mapping on the Omni S2, Retractable LiDAR (RetractSense) that lowers under furniture, plus VertiBeam side… on the Saros 20 Flow. Obstacle avoidance: Detects obstacles over 1 cm and 200+ object types (brand claim); Vacuum Wars scored a… on the Omni S2, Reactive AI with structured light and RGB camera, 300+ object types, objects down to 3… on the Saros 20 Flow.

Full reviews: [Eufy Omni S2](https://robotsforthat.com/robot/eufy-omni-s2/index.md), [Roborock Saros 20 Flow](https://robotsforthat.com/robot/roborock-saros-20-flow/index.md)