Any Difference Between Gold and Silver RCA/XLR Connector Plugs?

As the French Chef says: "No diffawrance!"

When’s the last time you had your ears candled?

Wow, I'm surprised there are no other answers than "it makes no difference".

Silver is the best conductor of electricity.  However, it can come across very bright sounding.  It tends to push the upper mids and highs.  Sometimes there is a lack of bass or a lean bass.

Gold-plated will not corrode or tarnish like silver, but it generally is warmer sounding with rolled off or soft high frequencies.

Of course it makes a difference. Of course they sound different. auxinput nailed it. But this is beside the point. In this case the reason for asking is the connector will be soldered onto DIY cable. That right there is the problem. The deficiencies of DIY cables so vastly overshadow anything as minor as the RCA plating it renders the whole question moot. Its like asking which speaker terminal when building a speaker from scratch knowing nothing about it but what some other guy said would work. Good luck.