1st: wrong forum for that
2nd:
sometime nV > ATi , sometime ATi > nV
you can't say "this one is better than the other" or "those sucks". On both side, some cards are better for some sort of thing. there's is "the best one" in general. It can be the best one for you if you play certain games that were based of a certain chipset ( like Doom 3 and nV).
anyway, it's up to preferences, some will prefer ATi , some will prefer nV. Both are good and there's no reason to insult or try to throw down one of them. On my side, I prefer nV cards but I know ATi ones are good ones too.