Yes, the dialectric is probably one of the most important things as for a sound goes.
Even most of the folks using Teflon agree Cotton is a wonderful insulation material. The problem is finding it!
I personally would use only Teflon or cotton insulation if I could. Foamed PTFE is pretty good for center to shield coax, but who makes a cotton one?
As for twisted wires, hard teflon is good, some receipes call for foamed teflon coated wires twisted tightly together.
Hard to get a pure cotton shield that is uniform enough to twist cleanly.
So if some cable makers can get a perfect cotton wrap for twisted pair wires whoo hoo (If they are cheap enough!)
Even most of the folks using Teflon agree Cotton is a wonderful insulation material. The problem is finding it!
I personally would use only Teflon or cotton insulation if I could. Foamed PTFE is pretty good for center to shield coax, but who makes a cotton one?
As for twisted wires, hard teflon is good, some receipes call for foamed teflon coated wires twisted tightly together.
Hard to get a pure cotton shield that is uniform enough to twist cleanly.
So if some cable makers can get a perfect cotton wrap for twisted pair wires whoo hoo (If they are cheap enough!)