I've A/B RCA wires and the difference from RCA wire A to B was obvious. Even had others (females) who did not even know what was going on notice the difference.
This does not mean one wire sounds better than the other does, but that the difference is obvious.
This does not mean I could not make both wires sound the same.
Although I think the wires being considered here will sound near, if not, identical.
What's transmitting and what's receiving and relative input and output impedance will make a big difference in an RCA's ability to make an audible difference in a system. Normally the difference in RCA or Speaker is inductance and resistance and there are billions of ways to get different combination of this and that's what better wiring companies sale.
Is the difference worth more dollars??
Anthony B. Davis
2Deep2 Silver SVT
2002 IASCA SQ Ult Ama 601+ World Champion runner up
2002 SLAP dBQ Champion

2000 USAC SQ World Champion
2002 USACi SQ World Champion