For those who own, use, and sharpen knives in both CTS-XHP, and M390/20cv: How would you compare and contrast these two steels? Interested to hear experiences. Does one chip or roll easier? Does one sharpen easier? Does one hold its edge longer? I know the theoretical answers based on steel composition, but interested to hear firsthand experiences, which can differ depending on who made the knife. Mine: not extensive, only have a handful blades in each steel. Have confirmed one of the on-paper differences: CTS-XHP was noticeably easier to get a good edge--and quickly--on diamond stones. Have not yet experienced chipping with either, but I haven't done high stress work with these yet; except for my Bradford G4, these are all folders. Both steels have fantastic cutting performance thru a variety of materials, no difference I can tell.