Ok I found the video I think you spoke of:
http://www.youtube.com/watch?v=DM6sPTcFpAc
Its Quadrant..and here is what happened..there are 3 things to notice in this..
1) Galaxy S2 started out slower because it got jammed on the I/O
2) Now the main reason the score was higher on the SGS 2 was because of the opposite..for some reason the Sensation was running at 17-50fps averaging 30fps..while SGS2 was running at its cap of 60fps..hence why the score was higher..
3) Quadrant is a dead benchmark..its not dual core friendly..all you saw was signle core vs single core..this is probably why the sensation had such bad fps as well...
Edit:
they both have an sd card expandable to 32gb..hence I left it out...
As far as ram and performance..yes more ram heps..but do you honestly think these benchmarks that they use actually use over even 100mb ram? as far as "current benchmarks" its insignificant