Original thread: http://www.avrfreaks.net/index.p...
where AVRfreak eieland posted:
Hi Fellow Freaks.
This document (see attachment) showing released AVR XMEGA devices and a high level spec should give you at least an overview of what the different families offer.
And from AVRfreak Smalldog:
Check out page 9 on this PDF:
I think this is the best document I have found which outelines differences between models.
I think the document is a few years old, but it gives you a good idea of what the differences are.