2 years later I still have the first and original set of OEM props that came with my Mini4P, and they remain undamaged, so I am not remotely minded to change them any time soon. I don't find there is any need for that machine to be quieter than it already is, but I have seen a good few comparison videos over the years, with db meters involved that show fairly tiny differences between OEM props and the ones that claim they are quieter.
I do see the advantage of brighter colours / better visibility of course, but again, in comparison videos I have seen the difference (in practice at distance) is marginal at best. If I wanna see it further away I am going to fit a strobe on the underside, which I suspect is orders of magnitude more effective !