Misleading? Perhaps.
Or, perhaps the differences in casting and forging, heat treating, tolerances, usage, and other factors are involved.
Some pistol parts are made of zinc- is that a "metallurgy" issue, or a design/manufacturing issue?
My point is that wear patterns, damage, etc. can be caused by a myriad of other issues, and "soft steel" and "hard steel," 4140 steel, O-1 steel, 1095 steel all look the same.
Wear patterns seldom have much to do with metallurgy, and more to do with other factors.