I thought that (power) cables discussions (pro et contra) on audiophile forum are thing of ancient past. However, for anyone who has doubts, my advice would be to simply insert all Cardas power cords in his system and than change them with Nordost. If one could not hear the difference, its in a wrong hobby, or needs an urgent control of his ears
On the other hand, the ’proper’ question should be why and how the certain manufacturers had managed to make their power cables sound like the rest of their lines, meaning, ic and speaker cables. For example, if you take above mentioned Cardas or Nordost , you will notice that CGR or Nordost Valhalla power cords have the same sound signature as other cablles from that particular line..
So, imho, its obvious that manufacturers have the ways of ’tailoring’ the sound of cables. Would be very curious to know and understand process behind it