Roborock S8 MaxV Ultra vs iRobot Roomba j9+

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

WINNER

Roborock S8 MaxV Ultra

Roborock — #8 overall

8.1/10

$899

iRobot — #28 overall

6.1/10

$599

Roborock S8 MaxV Ultra is the clear winner, outscoring iRobot Roomba j9+ by 2.0 points. However, iRobot Roomba j9+ has 33% cheaper.

Criteria	Weight	Roborock S8 MaxV Ultra	iRobot Roomba j9+
Total Score	—	8.1/10	6.1/10
🗺️Navigation & Obstacle Tech	2x	92%*	85%
💨Suction Power	1x	90%*	85%
📐Edge Cleaning	1x	88%*	75%
💇Tangle-Free Rollers	1x	85%	85%
🧹Mop System	1x	85%*	0%
🔥Mop Drying	0.5x	85%*	0%
🧴Integrated Soap	0.5x	80%*	0%
🔄Mop Versatility	0.5x	50%*	0%
🗑️Auto-Empty Reliability	1x	90%*	88%
📦Bin Capacity	0.5x	85%*	80%
⏱️Refill Frequency	0.5x	85%	85%
🧗Obstacle Mobility	1x	40%*	35%
📏Low Clearance	0.5x	45%	60%*
📱App Quality	1x	92%*	82%
Price	—	$899	$599
Pros		+Excellent value when on sale ($899) +Strong all-around performer +LiDAR + AI camera avoidance +Matter smart home support	+Trusted iRobot brand +Excellent camera-based avoidance +Strong pet hair pickup +Easy rubber brush maintenance
Cons		-Large dock requires space -Mopping not quite as good as Matrix10 -MSRP is expensive ($1,799)	-No mopping capability -Slightly weaker in corners -Less cutting-edge than competitors
Suction		6,000 Pa	4,000 Pa
Navigation		LiDAR + Camera + AI Avoidance	Camera + AI Avoidance
Mop Type		Sonic + Auto-Wash	None
Self-Empty		Yes (60 days)	Yes (60 days)
Runtime		180 min	120 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