On sale is Ecovac's successor to the Deebot N8 with a heap of improvements. The main difference is that the suction is now more powerful at 4300pa (was 2300pa), the LiDAR sensors is 4x more accurate with 2x the range and a larger battery offering up to 300 minutes of run time (was 110 minutes).
There's currently a promotion on the listing where you can get a bonus rubber brush that once inserted will pickup hair and dirt more easily, as well as being easier to remove tangled hair.
Other features include an E11 filter for capturing dust/allergens more efficiently, mop attachment with a water tank, multiple levels of cleaning, multiple floor map support, app control, voice control, WiFi connectivity and compatible with the Ecovacs auto-empty station (not included).
Would this be considered an upgrade from the T9?