well you cant really compare it to the zr1 you can only compare it to the z06 if you want to compare the cars in terms of price a nicely equipped z06 runs in the high 60s a gtr is low 70s theres only one option i think so if you want to compare the supercharged 600 that cost 100,000 to a gtr which cost 70 the intial reason for even making the gtr was to reach those cars but if you want to compare you would compare the gtr to zo6 and the gtr spec v thats coming out to the zr1.