i would of course pick the supra coz i'm biased lol
skylines with alot of money thrown at them can make good power, here in nz they are very common and you do get bored of seeing them
a supra on the other hand (mk3) isn't well known/common and alot less money can be spent for the same amount of power
both have their own body styling and it's really your own taste to what you pick
both have advantages and can make power.. it's just what you like and wanna buy