Which is better for homes with carpet and hard floors?

The Roomba Plus 405 Combo is the clearer pick because its mop pads lift automatically when carpet is detected. The Shark listing does not describe carpet detection.

Is the Shark worth the extra $211?

Only if its higher owner rating matters more to you than price and a self-washing dock. The Roomba costs $359 at Best Buy as of October 28, 2026, against $570 for the Shark as of October 30, 2026.

Which has the bigger dustbin?

The Roomba, at 0.1 gal versus 0.09 gal for the Shark. The gap is small.

Which is better rated by owners?

The Shark, at 4.5 out of 5 from 203 ratings, against 4.2 from 55 for the Roomba.

Does either wash its own mop pads?

The Roomba's AutoWash Dock washes and dries the pads and empties the bin for up to 75 days. The Shark listing describes no self-washing dock.

Neither listing gives a decibel figure. Roomba owners call the vacuum and the dock drying cycle noisy, so try either in person if noise matters.

iRobot Roomba Plus 405 Combo vs Shark PowerDetect ThermaCharged Robot Vacuum

Buy the iRobot Roomba Plus 405 Combo if you want a self-washing mop dock and a lower price: it is $359 at Best Buy as of October 28, 2026, versus $570 for the Shark PowerDetect ThermaCharged as of October 30, 2026. The Shark PowerDetect ThermaCharged has the stronger rating (4.5 from 203 ratings versus 4.2 from 55) and a bigger dustbin, but it costs $211 more. For most shoppers deciding on price and hands-off mopping, the Roomba is the better buy.

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