The Genesis version of Shaq Fu has five more playable characters (Auroch, Colonel, Diesel, Leotsu, and Nezu) and three more stages (The Lab, The Wasteland, and Yasko Mines) than the Super NES version, thus the Genesis version has a longer story mode.
Beast, when struck in a certain way, would have his skin dissolve away revealing a skeleton which crumbles to the ground.