I have to say, though, the difference to me was night and day. I listened solely to the eBay cable for weeks and didn't enjoy the headphones that whole time. I switched to stock cable and for the past day or so I've been reveling in how good the phones can sound. I was about to write these phones off before that.
Now, the argument is often that people who buy more expensive replacement cables want to hear an improvement because they subconsciously want to validate their cable purchase. Nope. Not here. Exactly the opposite.
To my ears, the stock cable, the ones that came free with the headphones, sounded much more satisfactory than the $16 replacement cable.
And I don't have a bias one way or the other about either of the cables other than how they make my music sound.
But I'm not writing off anyone's claim if they don't hear a difference. I can't tell you what you do or do not hear with your ears. Only you can say.
As long as you're enjoying your music, all is good.