Is it better to connect the ground to each side of the RCA cable?
I think you mean the SHIELD, i.e. if there is one, is it better to connect it on both sides. No, it's best connected (to ground) on one side only.
What's better, one conductor or two conductors for an RCA interconnect?
I have a somewhat nice RCA analogue interconnect with one conductor, referred to as a coaxial Cable I guess. But I see higher end RCA cables with two conductors and ground wire. Which is better?
Is better detail provided when connections are made with two conductors?