The Roborock S8 MaxV Ultra costs about $1,800 at full retail. The Roomba j9+ costs around $900. Seems like an easy decision, right? Not so fast.
The Comparison Isn't Fair
The Roomba j9+ doesn't mop. At all. It's vacuum-only.
If you want mopping from iRobot, you're looking at the Roomba Combo j9+ at $1,400. Now the price difference is $400, not $900. And for that extra $400, the Roborock gives you:
- Way more suction (10,000 Pa vs Roomba's lower power)
- A dock that washes and dries the mop with hot water
- Automatic detergent dispensing
- The FlexiArm that reaches corners
- Faster charging
That's solid value for $400.
Real-World Prices
Nobody pays full retail. Both go on sale regularly:
S8 MaxV Ultra sale prices: $1,299-$1,399 (25-30% off) Roomba j9+ sale prices: $599-$699 (25-30% off)
Prime Day and Black Friday are your best bets for deals.
Which One Makes More Sense?
If you only need vacuuming: The Roomba j9+ at $900 (or $600 on sale) is solid. You're paying for good vacuum performance without mopping features you won't use.
If you want vacuum AND mop: The S8 MaxV Ultra is better value than the Roomba Combo j9+. More features for about $400 more.
If budget is tight: Wait for a sale. Both products see significant discounts multiple times per year. Setting a price alert can save you hundreds.
The Bottom Line
At full price, the S8 MaxV Ultra is expensive but feature-packed. The Roomba j9+ is more affordable but does less. Compare what you actually need, not just sticker prices.
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How we researched this
Where this comes from: this answer draws on the product's published specifications and the reviews ShopSavvy collected for it, alongside prices from ShopSavvy's price data.
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