dump question really XD... thats prototype... of two reasons... 1: its a lot more fun, deep and best of all its violent... and secondly, its a lot less buggy...
other than that, if you check reviews and stuff, i can tell you that godfather 2 is just... plain ... bad! most main releases in the past few years are better. its shallow, ugly, horrificly buggy, and a lousy mulitplayer
PROTOTYPE!!! it is so fun u can drive tank an fly helicopter and kill zombies and it is so many peapoles that u can kill and u got some awsome super powers that u can use.