An ideal wire would be the same; a practical wire is not. But for (at) audio I really don't care... For me, this whole debate falls into the "much ado about nothing" category, except it ain't "nothing" for everybody, I guess. Another #^$! absolute.
As I just explained, getting variations from ideal is fine but has nothing to do with this topic Don. People are not saying audio cables measure different one direction vs the other. They are claiming that it is designed to work better in one direction than the other.
I have worked with RF to low Gigahertz frequencies and yet to see any cable advertised as being directional. Sure, if you switch it end to end maybe you find some differences due to minor factors like you mention but that is not by design.
I used to work in pro video space where SDI is used for serial communication over coax. Current standard goes up to 12 GHz. Belden 194A is a common cable for such use:
https://catalog.belden.com/techdata/EN/1694A_techdata.pdf
There is not one word in there about directionality. Just bandwidth vs distance.
Long time ago I read a statement from Belden on directional cables. They said they pull the cable in certain direction and they can indicate such to customers but that there is no benefit or difference at all there.
So no, there is no support for directionality of wire much less fuses in RF circuits either. This is just a made up concept by audiophiles. I know you know all of this so please don't give ammunition to likes of
@audio2design to run with when they have no clue about any of this.