always remember that throughout all of these comments peopl will comment on a steel getting more sharp than another, ignore that. ive shaved with a brass knife, ive shaved with 440, 440a,440c, n690, aus6, aus8, s30v s90v, vg 1, vg 10, san mai iii, carbon v, 154cm, m4, 420hc, 420, 8cr13mov, 3cr13mov, d2, 4116 krupp, sr 101, 1095, 1055, 1075, 5160, h1, in knives ive bought, knives ive made, steel gets sharp if you know how to sharpen. whittling hair is no problem for any of the above mentioned steels. for any knife that will be used and not held under a tunneling electron microscope for a display of an edge being one atom thick or something, how sharp a steel will get should never be on anyones mind. but. how they sharpen are different in some subtle ways, and with what youre using to shapen them changes those ways too. corrosion resistance also depends on blade finish. a polished finish will resist rust a little better than a bead blast finish. all steels are different, PLUS all people heat treat them different. so, Sogs ka bars cold steels crkts spydercos AUS8 hollow ground sharpened with the same setup will all be a tiny bit different. no, there is no end. it never ends. once you start its all over. welcom to the afterlife. i would suggest finding a new u station.