Robot Vacuum Comparison · UK 2026
eufy Omni S2 vs Roborock Saros 20

Specs, pros and cons compared side by side

Both the eufy Omni S2 and the Roborock Saros 20 are robot vacuums. This head-to-head sets them side by side using the specs, pros and cons from our full reviews. eufy specs come from eufy’s own UK pages and manuals; Roborock specs come from Roborock’s own UK pages and manuals.

Quick verdict

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eufy Omni S2

Pick it for: Self-rinsing roller mop at 15N (the Saros 20 uses spinning pads at up to 13N) · Up to 260 minutes of vacuuming (Roborock publishes no runtime)

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Roborock Saros 20

Pick it for: 36,000Pa suction (the S2 has 30,000Pa) · Mop wash up to 100°C (the S2: 70°C) · Climbs double thresholds up to 8.8 cm (the S2: 4.2 cm)

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Quick comparison

Spec eufy Omni S2 Roborock Saros 20
Suction 30,000Pa 36,000Pa
Navigation 3D MatrixEye 2.0 (RGB camera + 3D dToF) StarSight 2.0 (3D ToF + RGB camera)
Mopping HydroJet 2.0 roller, 15N, 360 RPM, 28 mm lift Dual spinning pads, 200 RPM, up to 13N, FlexiArm, auto removal
Dock Empty (2.5L bag), 70°C wash, hot-air dry, detergent, ozonated water Empty, wash up to 100°C, 55°C dry, refill, detergent
Runtime Up to 260 min (quiet, vacuum only) Not stated
Smart home Matter, Alexa, Siri, Google Alexa, Siri, Google, Matter
eufy Omni S2

Pros

  • 70°C hot-water roller wash
  • Roller mop presses down with 15N
  • Works with Matter, Alexa, Siri and Google
  • Up to 260 minutes of vacuuming (quiet mode)

Cons

  • Tall 670 mm station, and eufy’s diagram shows 1 m of space above it
  • Automatic refill and drainage needs the optional Auto Refill and Drainage System bundle
  • The manual gives runtimes for vacuum-only mode only
Roborock Saros 20

Pros

  • 36,000Pa suction, the joint highest in Roborock’s UK range
  • Mop wash with water up to 100°C
  • Climbs double thresholds up to 8.8 cm
  • Slim 7.98 cm body for low furniture

Cons

  • Roborock does not publish the runtime or tank sizes
  • Cleaning solution is not included
  • Large dock (381 x 475 x 488 mm)

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Which should you buy?

Why choose the eufy Omni S2

  • Self-rinsing roller mop at 15N (the Saros 20 uses spinning pads at up to 13N)
  • Up to 260 minutes of vacuuming (Roborock publishes no runtime)
Why choose the Roborock Saros 20

  • 36,000Pa suction (the S2 has 30,000Pa)
  • Mop wash up to 100°C (the S2: 70°C)
  • Climbs double thresholds up to 8.8 cm (the S2: 4.2 cm)

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