The question here is... Is the GT-R a trackday special (probably more applicable to the Evo model)?
I say no except maybe in the Evo trim. My idea of a trackday special is slowly becoming more well defined.
No radio, track-ish tires, no power options like windows and locks... Those are a few of the standards I'd hold for a trackday special.
Not every one individually and specifically but combonations of characteristics along those lines, that's how I'd judge a trackday special.
Harsh suspension, once again, is very subjective criteria.
The actual mechanical build of the car, that's not subjective (for the most part, although glass windows vs plexy glass or some kind of racing material... that's getting slightly subjective
).
My guess is that the Evo model is the closest to trackday special and it's still short of that title. For refference, I'd just guess the NSX-R is the base of "t.d.s.". Beyond that something along the lines of the GT3 on to GT3RS, then to caterhams and the like, then to radicals... Cars like the radical really are radical when you compare them to normal everyday cars like my Corolla.
Btw, by the same logic as I've used above, I'd say cars like the Enzo and Carrera GT are not trackday specials. 👍
The F40 though...