I would get captive every time. Wild caught clowns are ok hardy , but captives are bullet proof. The old deal with colours is no longer true, and most of the more exotic colour schemes now seen are only available from selective breeding of tank bred fish. Some of the wild caught clowns quite commonly arrive with a full set diseases, it's not just feeding that's a problem. Also en route mortality for perc clowns is pretty high.
True percs are called 'true' to distinguish them from ocellaris 'false' percs though the difference is pretty minor. I'v seen black and white ocellaris too.