Better RAM means nothing in android cuz RAM is used by Multi-tasking not related to performance much,
Super Amoled Plus is cool but still its WVGA and somewhat slight blurry,qHD panel on Sensation is pin sharp display and good for almost everything.
MSM8x60 in Sensation is nor A8 neither A9 its Qualcomm's own Design and this chip is independent,means it clocks its voltages frequency according to load. Thus,its better than rivals. N Adreno 220 graphics chip is far better than Mali-400 MP used in Galaxy S2 line-up.
N Sensation XE has the same cpu which is present in Original Sensation,its just overclocked,HTC downclocked it on the Original Sensation to save battery.
Update your phone for 2x better performance.