Plating and wire materials are very interesting. In my system I use two 75 Ohm RCA cables; one on my universal player and the other on my streamer.
I had been using WireWorld UltraViolet cables, which consist of a 24AWG silver-plated wire and has gold over silver RCAs. I replaced those with the Cullen Nitin Coax that uses an 18AWG solid copper wire with Belden 75 Ohm RCAs with nickel/tin plating over brass.
I much prefer the Cullen. It has a smoother, fuller and a more quite sound. I was surprised because I wasn't sure what to expect from connectors the nickel/tin plating over brass.
A new power cable I have has Rhodium plated plugs and uses silver-plated copper wire and my new speaker cable also uses silver-plated wire as well. I was apprehensive about trying them, because I have read so many negative experiences of people not liking Rhodium or silver plating and nickel/tin plating; but after a bit more than 50 hours in with them my system has never sounded better.
All that to say that cables can be very frustrating. I'm glad I'm nearing the point that I won't have to think about them (much).;-)
Cheers,
Scott
You might find this interesting samac as it supports your position. Reds and greens "do not mix" if possible.
Second list rectification voltages between materials.