So how much difference is there in level design and overall graphics between the 3 versions? I wanna buy it for Wii just because wiiremotes is funnier to play with then an original controller, but i havent found so much comparrising videos,

is the level design same in all 3 and hows the wii graphics?

The wii is obviously dumbed down a bit graphicwise cause it's not built for such graphics. The rest I hope they kept the same, or very similar.