My favorite aspect of 6.5 if Kinetic Scrolling! it's it soooo smooth and you don't click on emails on accident anymore. and then it is just all around FASTER. my touch pro was unbearable with the stock rom, some of the 6.1 roms by mighty were pretty fast, but just like the TP2 they lacked the Kinetic Scrolling.
P.S. i will say though, i am quite impressed by the quality of the Stock TP2 Rom and am kind of content not feeling the NEED to flash every 3-5 day's!