HX stands for Hunting, and I believe they're all in MOA.
I have both Credo and a Tenmile and while they're not apples to apples in comparison being a big difference in models, the Tenmile is clearly "nicer". Tough to put into words lots of little things, like zoom seems a little smoother, glass seems a little better. Of mine the Credo is clearly the lesser scope, but had I not owned the Tenmile first, I don't know that I would have noticed as much.
