Performance is the thing that im looking for..
Im using CM9 rom with smartassv2 governor.. SO just an fi that im notlokking for tweaks but just the differenc between android versions...
think of it like a car one has V6 engine and other has V8 not a big leap but it will be smoother faster more stable new icons better UI stuff like that ..... its always better update to the latest version of rom , radio whatever as new programs n scripts need those extra happy meals for food ^_^
HOPE I HELPED IF SO HIT ((((( THANKS ))))