My doctor has a rose gold ROO. He's a serious veteran collector. He loved my ROO. And he had no idea it was a rep. The dude you mention in your anecdote was bluffing (and he obviously won the round). There is no real difference in finish. My doc's rose ROO is finished the same.
OEM is big frivolous $. A suspecting conoisseur will be:
a. jealous
b. wondering if your lifestyle can support such frivolous spending
I wonder the same thing when I see dufuses in my city of Bentleys, Astons and Ponitac Fieros with Ferrari Body-Kits rockin' Jacobs, Pateks,, etc... SOme of these jackasses are frontin' bigtime, some are not. Personally, I am lucky enough to support my lifestyle despite my relatively still youthful age