I'm in the same boat mate. I have a black Pre-facelift FR and can't decide if I want to leave the FR mirrors or change to the black Cupra equivalent.
Sometimes I like the FR ones, sometimes not. End of the day the cupra ones are only £12(ish), so not exactly bank breaking if I decide I don't like em. Not fussed if "Everyone's done it" really. Stuff looks good or it doesn't.
Only
problem is, it's probably gonna make me want to change the wheels ASAP. it's on the cards anyway, but I have more important things to be spending my cash on at the moment (sorry car)..!