the best thing about 6.5 is amazingly responsive finger flicking on all menus. That alone is why i love it. I can flick through file explorer, text messages, emails etc with amazing speed. Plus it seems to me battery life is improved. and I love the built in slide to unlock that I ditched s2u2.
Here is a video I madeof my touch pro 2 running 6.5:
http://www.youtube.com/watch?v=Ack9KVaj9h8