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? 

jumia

All cables have two conductors!

RCA cables are coaxial cables, meaning that each cable has a positive conductor (inner) and a negative conductor (outer).

RCA cables are coaxial cables

Not all, Kimber makes a braided construction cable, for example.