Sub cables typically have differences in both the conductor and/or dielectric (shielding) to prioritize the current delivery of lower frequencies and…
Interconnect cables are typically voltage devices as the input impedance is very high.
There is almost no current in these cables to speak of.
needed speed without worrying about the tone of the higher frequencies.
The speed of electricity is the same in all conductors, and it is about a million times higher than the speed of sound.
