Yeah, test drive both and see what you think.
I'm 6'1 and my C6 is comfortable for me even with a helmet on for road course shenanigans. I think C7 and beyond got a bit more tight / claustrophobic in terms of seating positions but maybe more in width than height.
I can never get through trying to talk myself into a P-car given how much more money I'd have to spend just to go slower (911 turbos notwithstanding but then you can argue C7+ Z06 for the money and end up in the same predicament)