if any of you have driven either or both, you wouldnt be saying this. unless you like shitty handling on the Z and that its soooo much slower than the STI then the Z is your car. for performence all around the STI takes it. looks is the ONLY thing the Z might have over the STI only because its a matter of opinion and not on paper. and im guessing with some free mods like 19lbs on an STI your in the 12's consistantly. im not sure if the Z even has free mods.