Chris I am not sure if your review states that the resistance of the stock cable and the CB13 are the same. To clarify the CB13 is .2 ohms and the stock cable is .4 ohms per channel. Also the CB13 is a type of Litz construction and uses flat wire for better skin effect with frequencies.
No, I just mentioned the resistance of a cable as one reason why an in-ear can sound different when using aftermarket/upgrade cables.