Heh... a little difficult to compare the two, although I wouldn't colour them as apples and oranges. They are both team based first person shooters.
Because TF2 likes so cartoonish (I think it looks great though, don't get me wrong), but the reality is that assuming they both turn into solid games, ET will see more gameplay, more clans, more tournaments, people will just take a serious game more seriously. I think they will both be huge, but ET will take the cake.
Ben, come on... ET looking better than Crysis?? Haha, I guess it all comes down to perspective.. we'll need to see some previews before we start making any guesses. Personally, I think Crysis will be better looking even more Gears Of War. That game is just unbelievably good looking.. I'm hoping once I graduate I can snipe a position at Ubisoft or something and start working on some nice games.. I've got a lot of ideas to bring to the table, just that I can't afford the table!
Anyway, a good discussion. Keep up the good work. Finally Ben is throwing in more opinions (whether I agree or not, but thats the point right?).