Early 70s Pontiacs; I normally pick pony cars over their bigger muscle brothers, but in this case; I would pick the GTO. I for some reason can't resist it, it's as if it's begging me to pick it.
Nismo Skyline Z-Tune (R34) vs Nissan GT-R Nismo (R35); Tough choice, but I would choose the R34. The R35 is still a better performer clearly, but the R34 has more character and I always found the R35 to be a bit soulless in general now that I think about it.
Fast & Furious 4 R34 vs Nissan GT-R Nismo (R35); I'm actually going with the R35 this time round. I'm just not as interested in Fast and Furious as I use to be, so the R34 being known for that movie kinda made me loose interest and the R35 is an amazing track machine (but still has a very annoying fanbase).
Shelby GT500 vs Buick Riveria; Shelby GT500, I don't really care that much for buicks other than the GS & Regal and yeah; the Mustang is still one of my favorite cars of all time. Of course I'm going to pick the still epic (but my least favorite body design) Shelby Mustang.