Electricity carry'* through wire by magnetism pushing free ions through the wire (Simplest way to say). It'* through the entire body of the wire. Otherwise you could have hollow wire, or use anything as a core.......
I'm not an audio freak Raptor, I'm an electrician. OFC is OFC. Google it, shop, and take your pic. Wire is like Women, Tires, Batteries. Everybody has a fav.....It'* is UL your good. The rest is insulation/color choices. I'm sure the GearHeads will be back soon enough with their Favs.