I came away thinking that Atmasphere cleverly skirted answering the question of whether or not expensive power cables of the SAME gauge will improve the sound of an amplifier versus their less expensive counterparts.
Instead, I thought that what he was writing is that a power cord needs to be of significant gauge to handle amplifier voltage drop.
I believe that you (and maybe Atmasphere if I misinterpreted his post) are implying that power cables of the same gauge can carry different amounts of voltage from each other?