Got a couple of options to why your reply was typed like that, either
A: You're having a bad day
2: You're an asshole
D: Being a bit sarcastic and are not really yelling or frustrated
Please tell me which it is, though I hope you're not being serious about nothing being different between the two since first obviously better graphics, second there's blood splattered on the wall like Perfect Dark, third can play against way more than just three other players, fourth controls are not the same since this is on a keyboard and not a controller (at the moment), fifth there are gameplay differences like not being able to spam with closing & opening the doors and
the cross air always being in the center of the screen and not being able to be moved around (possibly not yet).
Though with my luck you're were just kidding and think I'm taking this too seriously.