ALso it forces you to make all your moves at once, while we play you can move as you please. I.e. as many times as you want in a turn, but only 1 at a time.
Other than that, the game is fuckin AWESOME. Takes a while to play, but its great for a social gathering. It keeps the bickering down unlike RISK were friends get all pissed when you beat them.
If you play our way with open alliances to whoever you want, it gets fucking intense.