Jaqwire KEB vs Shimano DA Brake Cables
Only use compressionless brake housing on mechanical discs if you want them to perform well and avoid problems with bottoming the lever against the bar. Shimano brake housings, even Dura-Ace BC-9000 as far as I know, are all the conventional spiral design. I've put KEB-SL housing on many Spyres and other mechanicals and it works great.