Cable sound difference is something strange to debate
most people don't hear a difference , and some others do … for me there was no sound difference it just feels like there is a little bit better separation on my 660s but then again after a lot of changes on the cables and listening a lot of songs some times I can hear it some not. So if u ask me if there is a difference it will be small and that's an answer that both sides I think approve.
I think its mostly about the build quality and the looks don't expect a 150-300 euros cable makes a big difference in sound this is something that personally don't believe what ever the materials exotic or not.
And we are talking about stock original cables vs premium after market and no 10 euros cables from ebay .