kinect body & skeleton animation comparison

how can i compare two skeletons with kinect?

i would like users to repeat predefined moves with kinect (also will be captured with kinect).

something like introducing and teaching possible game action moves, before starting a game.
should tell correct percentage for a move.

Is this possible?

thanks,
alp

since i just saw ‘Dance Central’ on Xbox, i think this is very possible.
http://www.youtube.com/watch?v=Y-iKWe-U9bY

how do you think it is accomplished?

any directions?

cheers,
alp