Which is better for homes with hard floors?

The Combo 10 Max. It mops with downward pressure and the dock washes and dries the pad, so you are not scrubbing floors by hand. The j9+ only vacuums.

Is the Combo 10 Max worth the extra money?

At the latest prices it costs about $24 more, $599.00 at eBay as of November 7, 2026 versus $574.78 as of November 3, 2026. For that gap you get mopping, mop washing and water refills, so it is worth it if you have hard floors.

Which one is easier to move around?

The j9+ at 7 lb. The Combo 10 Max weighs 11 lb because of the mopping hardware and larger dock.

Which has better ratings?

The Combo 10 Max, 4.2 out of 5 from 88 ratings versus 3.3 out of 5 from 208 ratings for the j9+. The j9+ sample is larger, so treat the gap as a signal, not a guarantee.

Do both work with voice assistants?

Yes. Both support Alexa, Siri and Google Assistant. Only the Combo 10 Max adds Matter and Apple Home.

How long can each go without emptying?

The Combo 10 Max dock holds up to 60 days of debris and up to 7 days of water. The j9+ self-empties but no capacity figure was given for it.

iRobot Roomba Combo 10 Max vs iRobot Roomba j9+

Buy the Roomba Combo 10 Max if you want one machine that vacuums and mops, washes its own mop pad, and refills its own water. Buy the j9+ if you only need vacuuming and want a lighter robot. The Combo 10 Max is $599.00 at eBay as of November 7, 2026. The j9+ has only one recorded price, $574.78 as of November 3, 2026, so the gap is about $24 for mopping and a self-washing dock.

Today the iRobot Roomba j9+ costs $24.22 less at its best price.

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