The Nokia 7700/7710 (no, it's NOT the "N7710", please stop confusing yourself was a Symbian Series 90 UI powered smartphone. Symbian development focused on the Series 60 UI, for many reasons. As has been released, future versions of the Series 60 will once again support touch screens.

The Nokia 770 (it's not called the "N770"), the N800 and the N810 are Linux powered Internet tablets, built from scratch on top of open source components. There is very little shared with the 7710 device - although Nokia certainly uses some same technological components in multiple products - since the underlying codebase is fundamentally different. It is "not the same product with the GSM part removed".