Deck lid

I just want to know what’s correct! I bought car with deck lid on it already.
Build date was 10-71 so maybe owner had issue and put a ribbed deck lid on it?
I am just trying to find out what is correct
That wasn't what you asked- you asked about "desirability":
I am building a 71 and can’t decide if I should go with the crease or the flat deck lid. I have both and want to know what is more desirable before I paint it.
So if my build date is 10-71 which decklid should I have? Rib or no rib?
A 10/71 build dates indicates you have a '72 model year vehicle. So by your information it should have the rib.