The issue for some buyers (like myself) is not really how fast an R32 GTR is, compared to a R35 GTR...........but the Luxury you get from the R35 GTR. (Yes, I'm getting old LOL)
An R32 GTR is a Raw, Untamed Sports car........an R35 GTR is a Sports Car that was aimed more for the Luxury Market. (Leather, quiet exhaust, smooth ride, GPS, Climate Control, Cruise Control etc etc etc)
I know I can't wait to get my R35 GTR......as the car will be a lot smoother than my current Evo 9, which is also a Raw Drive. By that I mean the exhaust rumbles the car and is just not smooth.......an R35 GTR is so quiet and smooth......I bet you would be able tell the difference between a Loud Street Car (anything with an A.Market Exhaust) racing a Stock R35 GTR.......and how much more quiet the R35 is........without drawing as much attention (from the po po) as the Louder Car.
It all depends on what you want to drive and how Raw a feel you want to your car, as all GTR's are certainly capable cars!!!