From what I've seen the cards are neck-and-neck in most games, and even in Vantage when tested with the same hardware (i.e. in the same testbed) I've yet to see a difference of more than a few hundred points. Really guys? $ReaPeR$ is right, let's cut the fanboy crap...
And yes, international sales do matter, for a great number of gamers around the world. The fact that ATi tends to lead in price outside of the U.S. is a testament to nVidia's recent reliance on massive price cuts and subsidies to stay in competition, but that doesn't translate with much immediacy in markets outside the U.S. where the volume of hardware moved is significantly lower. There is a lot of evidence that nVidia is at this point losing money on some GT200 series cards, and while that's all fine and well for consumers, it doesn't say much for the company's ability to sustain their present development model and continue competing with AMD/ATi without taking on their more scalable philosophy in future chips.