There was a test a while ago Ive seen linked quite a few times if you search.
They did a blind test, were an "audiophile" was tested to hear the audible difference between a very expensive set of rcas VS and coat hanger. He couldnt tell the difference....
QUALITY build, as in reliability, may differ. But Ive never heard of anyone being able to tell a difference with properly working rcas.
Personally, I go with the Knu Krystal rcas and splitters, for $7.99, there great build quality, good thick sturdy insulation. Go with those