The guys at Nissan HQ here that I've spoken to said that exactly. With the same tires, nearly identical performance metrics. Regardless, the Z will be a much more comfortable, liveable car for daily use and road trips. Plus, you can actually roll the windows down with the Z!
1994 300ZX NA 2+0 (sold March 2017) 1993 300ZX TT 2+0 2008 350Z NISMO #1242