iRobot Roomba Combo j9+ vs Roborock S8 Pro Ultra

A detailed side-by-side comparison scored on 14 objective criteria with weighted scoring (max 12 points).

iRobot Roomba Combo j9+

iRobot — #25 overall

6.7/10

$999

WINNER

Roborock — #12 overall

7.9/10

$1,099

Roborock S8 Pro Ultra edges out iRobot Roomba Combo j9+ with a 1.2 point advantage.

Criteria	Weight	iRobot Roomba Combo j9+	Roborock S8 Pro Ultra
Total Score	—	6.7/10	7.9/10
🗺️Navigation & Obstacle Tech	2x	85%	88%*
💨Suction Power	1x	82%	85%*
📐Edge Cleaning	1x	75%	85%*
💇Tangle-Free Rollers	1x	85%	88%*
🧹Mop System	1x	65%	85%*
🔥Mop Drying	0.5x	0%	85%*
🧴Integrated Soap	0.5x	0%	80%*
🔄Mop Versatility	0.5x	25%	50%*
🗑️Auto-Empty Reliability	1x	88%	88%
📦Bin Capacity	0.5x	78%	85%*
⏱️Refill Frequency	0.5x	75%	85%*
🧗Obstacle Mobility	1x	35%	40%*
📏Low Clearance	0.5x	60%*	45%
📱App Quality	1x	82%	90%*
Price	—	$999	$1,099
Pros		+Trusted iRobot brand +Retractable mop lifts fully +Strong obstacle avoidance +Self-emptying base	+Proven reliability +Dual rubber brushes +6,000 Pa suction +Sonic mopping vibration
Cons		-Mop is basic (no wash/dry) -Expensive for features -No hot air drying	-Older than S8 MaxV Ultra -No AI obstacle camera -Large dock
Suction		4,000 Pa	6,000 Pa
Navigation		Camera + AI Avoidance	LiDAR
Mop Type		Pad	Sonic + Auto-Wash
Self-Empty		Yes (60 days)	Yes (60 days)
Runtime		120 min	180 min
Mobility
Obstacle Climbing		Standard	Standard
Retractable LiDAR		No	No
Adaptive Chassis		No	No
Multi-Mop Switch		No	No
		Check Price Full Review	Check Price Full Review