Audiolabyrinth, I now have all rhodium GTX-Dr outlets in my HFC Waveguide p c and on four of my HFC Ultimate Reference power cords. But I have not had any gold counterparts with which to compare them, with the exception of the HFC Ultimate power cord, which frankly is not in the same league as the Ultimate Reference Rhodium internally, price, or sound.
I have compared silver versus gold ics long ago and some comparison of gold plated RCA jacks with solid copper jacks and always disliked the gold. So you can see that I have done some comparisons, but having done a good deal of scientific research over my career, I don't see any of this as well founded.
In short if you do all of these comparisons, please tell us what you think.