Being an owner of a GN and a Supra, all I can tell you is, apples & oranges, same shape different tastes. GN's can ET without a doubt very easily and cheaply,they have alot more torque and a suspension to go with it. As far as Supras go, my first run stock was 13.85@106 (auto). Now my Supra has run 12.47@116. I haven't run my GN yet due to some tranny issues, hopefully some 11's are lurking in that car.
Its been my understanding that both camps GN & Supra owners totally respect one another, and haven't seen anything to the contrary.