I have a road bike with the Dura Ace 7800 drive train with Gore cable housings. I popped the front shift cable on a ride yesterday. Last time I did a cable replacement I don't remember Shimano having PTFE coated cables. So I have a choice now. There's PTFE coated, zinc coated, and some packages make no mention of coating, just "stainless steel".

So what info do I need about these products to make an informed buying decision?

Thanxx!