iRobot Roomba Combo J9+ Robot Vacuum & Mop vs Xiaomi Robot Vacuum S20 Pro+ (2026)

✍️ By the 247Verdict Editorial Team📅 Updated 05 October 2026

Which is better? We compared both on score, owner ratings, pros and cons.

iRobot Roomba Combo J9+ Robot Vacuum & Mop

9.1/10 Excellent

4.3★ (2,400 owners)

Auto-empty, retractable mop lifts on carpet, PrecisionVision, 75-day empty. iRobot's flagship.

Full Review

Xiaomi Robot Vacuum S20 Pro+

8.9/10 Great

4.4★ (3,800 owners)

7000 Pa, LiDAR, auto-empty station, mop, 3D obstacle avoid. Best-value robot vacuum with station.

Full Review

At a Glance

	iRobot Roomba Combo J9+ Robot Vacuum & Mop	Xiaomi Robot Vacuum S20 Pro+
247Verdict Score	9.1/10	8.9/10
Owner Rating	4.3★ (2,400)	4.4★ (3,800)
Verdict	Excellent	Great
Navigation	PrecisionVision (80 objects)	LiDAR mapping

Quick Verdict

Both are strong choices, but the iRobot Roomba Combo J9+ Robot Vacuum & Mop edges ahead with a 9.1/10 vs 8.9/10. Auto-empty, retractable mop lifts on carpet, PrecisionVision, 75-day empty. iRobot's flagship. That said, the Xiaomi Robot Vacuum S20 Pro+ is worth considering if 7000 Pa, LiDAR, auto-empty station, mop, 3D obstacle avoid. Best-value robot vacuum with station. Check the current price on SwitchBot →

Pros & Cons Side by Side

iRobot Roomba Combo J9+ Robot Vacuum & Mop

Retractable mop lifts when carpet detected — no soggy carpet from mop drag-over
75-day auto-empty capacity with the Clean Base station
PrecisionVision navigation recognises and avoids 80 types of objects including pet waste
Smart Maps remember room layouts for targeted room cleaning from app
iRobot's 20-year robot vacuum reliability heritage in their most complete device

£700+ is a significant investment for robot floor cleaning
Retractable mop mechanism adds mechanical complexity vs simpler alternatives
75-day empty requires Clean Base station — significant counter or floor space

Xiaomi Robot Vacuum S20 Pro+

Auto-empty station included at under £350 — typically auto-empty adds £200+ to competitors
7000 Pa competitive suction handles pet hair and embedded dirt
LiDAR navigation builds precise room maps for systematic cleaning
3D obstacle avoidance detects objects including cables and small items
Xiaomi App provides full zone control, scheduling and cleaning history

Xiaomi brand data privacy consideration — Mi Home app collects usage data
7,000 Pa trails Dreame L10s Ultra Max and Roborock S8 Pro Ultra on peak suction
Auto-empty station bag capacity requires replacement every 60 days approximately

FAQ

Which is better, iRobot Roomba Combo J9+ or Xiaomi Robot Vacuum S20?

Is the iRobot Roomba Combo J9+ worth the extra cost?

Yes — iRobot Roomba Combo J9+ Robot Vacuum & Mop scores higher at 9.1/10 vs 8.9/10.

Who is the iRobot Roomba Combo J9+ best suited to?

Auto-empty, retractable mop lifts on carpet, PrecisionVision, 75-day empty. iRobot's flagship.

Who is the Xiaomi Robot Vacuum S20 best suited to?

7000 Pa, LiDAR, auto-empty station, mop, 3D obstacle avoid. Best-value robot vacuum with station.

What are the main downsides of each?

iRobot Roomba Combo J9+ Robot Vacuum & Mop: £700+ is a significant investment for robot floor cleaning; Retractable mop mechanism adds mechanical complexity vs simpler alternatives. Xiaomi Robot Vacuum S20 Pro+: Xiaomi brand data privacy consideration — Mi Home app collects usage data; 7,000 Pa trails Dreame L10s Ultra Max and Roborock S8 Pro Ultra on peak suction.

Do owner ratings agree with our verdict?

Largely, yes — iRobot Roomba Combo J9+ Robot Vacuum & Mop sits at 4.3★ from 2,400 verified Amazon owners, and Xiaomi Robot Vacuum S20 Pro+ at 4.4★ from 3,800.

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