Hello,
No differences in term of hardware.
In term of firmware, the Tea one is based on the pocketbook one + specific library to buy ebooks. The Tea Firmware is older than the pocketbook one.
You can update a Tea Touch Lux 3 with the Pocketbook firmware, then you will have a more recent firmware, but you will loose the specific library.
I give a trick on the french forum to access again the specific library after updating a Tea Touch Lux 3 with the Pocketbook firmware :
https://www.mobileread.com/forums/sho...d.php?t=269256
I have a Tea Touch Lux 3 and I updated it with the pocketbook firmware.