and if u go through the topic i had been asking what to buy sgs2 or sensation so i got sgs2 from a friend used it for two days, didn't like it immature UI still needs some polishing looking n feel is cheap plastic don't feel like i have spend 42k on a phone and i hv good understanding with sense UI so bought Sensation it more ergonomically designed feel solid in hands and for these things i can give away the slight speed that SGS2 has to offer
as for the camera comparison i found out Sensation to perform better and 1080p recording was also better compared it to SGS2, N8 (although there is a camera MOD that improves camera by 100% as the developers says so hvnt tried it yet)
as for many people complain that sensation has bad backup they are ryt but it can be increased by updating latest Radio and a ROM that uses the RADIO well so flashed the SENSATION XL rom that has BEATS music player and clocked at 1.5ghz battery timing increased significantly i am getting 1 day full (with constant Edge auto sync)