Well i think the same can be said about speakers or capacitors or spools. For instance you can buy a 22uF capacitor from Mundorf or from Audyn which are "technically" the same. But they sound quite different actually. Another example can me said about spools, if you take a 4.5mH spool and then compare the normal air inductor one to a pure foil spool they sound vastly different. So i think the same can be said about cable, since power runs on the outside shell of a cable and has sometimes be next to spools, heat etc.. i believe that cables can have a dramatic difference in a particular setup. Also cables have different resistances which effect different frequencys which also contributes to a different sound. Our hobby cannot be explained by technical aspects alone, eventough i would like that :-)