ZO6 hahahahahahahahah when will you understand that American cars are very cack, ZO6 has a 7.0l engine and about 500bhp. The american answer to everything is "make it bigger" normal corvettes already have a 5.7l if you gave that to a european or japenese manufacturer they would make a car that would kill a ZO6.
Litchfield in England make a subaru impreza 2.0l turbo which does 0-60 in 3.5 seconds, not to mention American cars handle like boats and cant corner. The legend Jeremy Clarkson put it best when he described the ZO6 that "the gearbox feels like it belongs on a plough", and that "it doesn't eally work"
In conclusion the ZO6 wont even come close to a GTR 
ha ha ha
Ahhh, but the Z06 has won it's class at Le Mans up until this year. Nissan doesn't do so well in international racing. In fact they had TWR racing (same one's responsible for the Jaguar XJR-15) build them a race car to compete back in the late 90's, it was called the R390.
The 7.0 liter engine in the Z06 has gobs of turque, something that many of the smaller engine Japanese and Euro cars can't produce unless they add turbos. Mercedes AMG tends to take the same approach as the AM, with their 6.2 liter engine (the 63 AMG series)
Jeremy Clarkson, like to say alot of shit against Am cars, but will sing the praises of any british car, then will call it crap in 5 months. But he loves his Ford GT
As the saying goes, "There is no replacement for displacement"