Two of the most versatile products in the iRobot lineup are the Roomba Combo j9+ and Roomba Combo j7+. These two devices are capable of vacuuming and mopping without any manual input — making them a compelling choice for anyone looking to streamline their floor-cleaning chores.

While the two robot vacuums share much in common (including a retractable arm for the mop), there are a few key differences to keep in mind when making a purchase. Here’s a look at the Roomba Combo j9+ and Combo j7+ to help you decide which is best for your smart home.

Pricing and availability

The Combo j9+ costs $1,399 and will ship by October 1. The Combo j7+ costs $999 and is currently available. Both include a docking station, though the j9+ boasts a design that’s a bit more eye-catching — thanks to a wooden top plate and vertical striations throughout the unit. Meanwhile, the Combo j7+ is much cheaper than the Combo j9+ and still looks like a premium product.

Winner: Roomba Combo j7+

Vacuuming

The two robot vacuums share a lot of the same DNA. This includes the use of dual rubber brushes for vacuuming, Dirt Detect technology to sense dirtier spots and increase the cleaning power, and an edge-sweeping brush. However, the Roomba Combo j9+ is said to have “100% more power-lifting suction” than the i Series, whereas the Combo j7+ has “standard” cleaning power.

Unfortunately, iRobot doesn’t share exact suction measurements, so it’s impossible to say how much better the Combo j9+ really is. But despite the lack of specifics, it’s clearly the more powerful of the two.

Winner: Roomba Combo j9+