I think this has already been stated multiple times: everyone looks for something different in a car, and everyone is biased in one way or another. For me though, this comparison comes down to just a few cars: the corvette zo6 and the ford gt for american cars, and the noble m12, m400, and the ultima gtr for european cars. This is because i am pretty much only concerned with performance bang for the buck, and i care more about acceleration than i do about handling (although i do care about both). As an american, i am very biased toward american cars, and if i had to choose i would go with american cars (mostly because of my love for the zo6 and because it is really hard to get the european cars I mentioned here in the US).