Which is better for pet hair?

The L40 Ultra Gen 2 lists 25,000Pa versus 12,000Pa, so it should pull more hair from carpet. The X40 Ultra still handles pet hair well and is rated higher by owners.

Which has the better dock?

The X40 Ultra. It auto-empties, auto-refills its water tank and washes the mop in 158°F water. The L40 needs a separately purchased module for automatic solution filling.

Is the X40 Ultra worth the extra $50?

At $549.99 versus $499.98, yes for most shoppers: better ratings, hot-water mop washing and included auto-refill. If you need maximum suction on thick carpet, the L40 is the better pick.

Which lasts longer per charge?

The L40 Ultra Gen 2, at up to 231 minutes in quiet mode versus 198 minutes for the X40 Ultra. The X40 has the larger battery, 6,400mAh versus 5,200mAh, but a shorter rated runtime.

Do both protect carpets from the mop?

Yes. Both lift the mop 10.5mm (0.41in). The X40 Ultra can also detach its mop, which is safer on high-pile carpet.

Which is quieter at night?

Owner feedback on the L40 praises quiet operation for nighttime cleaning. Neither listing gives a decibel figure, so compare measured noise before buying.

Dreame L40 Ultra Gen 2 Robot Vacuum vs Dreame X40 Ultra Robot Vacuum

Buy the X40 Ultra if you want the stronger track record and a lower price on most days: it is $549.99 at Best Buy as of November 6, 2026, and rated 4.3 from 76 ratings. Buy the L40 Ultra Gen 2 if raw suction and long runtime matter more than ratings: it lists 25,000Pa and up to 231 minutes, at $499.98 as of November 4, 2026. The X40 Ultra has dipped to $329.00, so watch its price history before paying full price.

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