For a direct comparison….
I borrowed some Guide CRsomething when my XT’s poo’d themselves in Nepal. I was running XT on the front, Guide on the rear.
The guides were great. Modulation, sqush, outright power, all comparable with the XTs.
The lever consistency was better with the Guides but you’d expect that being a fresh out of the box brake vs. some that have had a massive hammering since their last bleed.
The Guides are flop-flop. No messing around with hoses and levers if you buy cheap abroad. This means you can take a single brake away with you as a spare.
Either matchmakers or i-Spec to suit your shifters & dropper/reverb make a difference?
I prefer the XT lever shape & length but honestly, the Guide lever is fine and you just get on with it when you’re hooning it down a 45 dergree scree face or a dusty, rocky trail with massive drop off the side. You forget about the minutiae or lever shape in those moments.
So either way, I don’t have anything bad to say about the Guides and they even have some improvements over the XTs.
But… y’know…. they’re Avids really aren’t they?
😆
HTH
p.s. in 2 years of hard riding, me and the Mrs have each cracked a piston in XT brakes….