Except that's not really a different game; it's merely a slight change of format. It changes the recommended card count (100 cards per deck rather than 60), adds two significant restrictions (one copy of each non-land card per deck; only colors that match those on the Commander's card), and one significant new mechanic (the Commander, who doesn't have to be in your hand to be cast), but otherwise it is played exactly as the standard 60-card game.