Hard to say, maybe if the C8 was still front engine/RWD config, people probably won't cross shop between the two, but with the new one being a mid-engine, some may actually be pulled to the C8 just because it is a "different" Vette from before. Or maybe neither will sell well because they don't have a traditional manual option.
Oh....and if anyone is looking for a C7, is time!!!! LOL
completely agree here. C8 being mid engine, is its largest selling point.