Yeah I can agree with you on the twisting, mere marketing item.
But like you I have been in Car audio for some time, since 93. Just because its copper doesnt make it good cable grain quality of that copper could be crap. Take your average bulk purchase cable and measure resistance on it, then take whatever higher cable you offer in the same length and see what happens. I think we owuld both agree less resistance in cabling is going to be better correct?

But the question remains if you are sure of what you say why would you foot the extra cash for the higher end units knowing you could get the other cheaper and not notice a difference, just jipping yourself