The C6 ZR1 is much more refined and brutal with that forced induction. The C4 ZR-1 is more, raw. Not as powerful as the C6 ZR1 in engine and chassis, but still fun to drive and experience in its own way.
Right now, mine is garaged. It's a Canadian ZR-1 that came equipped with daytime running lights. The headlights are always popping up and down due to a light sensor at the top of the dash. The passenger side headlight gear has worn out. I have a brass gear replacement, but I've been so busy with work, I haven't had a chance to replace it yet.
It needs to be soon though. I'm way overdue for a drive in the ole girl.