Full-grain: leather as it came, cut; want good quality? - need good quality rawhide. Top-grain: cut the leather, "homogenize it", seal it; much more reliable a

Full-grain: leather as it came, cut; want good quality? - need good quality rawhide. Top-grain: cut the leather, "homogenize it", seal it; much more reliable and uniform quality without that much dependence on the quality of rawhide. It does make sense and in a way full-grain is a completely separate category (because of very little processing - "what rawhide you put in is what full-grain you get").