I didn't bother to mention this because most any machinists you go to does it, but it's pretty common while cutting for the larger seats they'll run the bowl tool down and enlarge the throat a small degree. That's probably what you are seeing on a factory 2.02 head.
What head porters like about this method (installing larger valves in a smaller valve head) is that they can manipulate the bowl to their liking for best flow results as they have more to work with, rather than having a larger throat with less material to start with. So there is an advantage to this process.
As far as intake and exhaust runner size, as well as combustion chamber, there is no difference. I've CC's original 2.02 heads and 1.94's that I have here. Nothing about them changed in that regard.