Like other topics on the forum, there are members with significant knowledge here. The quality of the steel and heat treatment is undoubtedly important. So is a person's ability and process when sharpening the knife. For the guy that likes quality tools for the field, but doesn't have metallurgy degree, it is tough to discern what are the practical benefits of buying a higher end knife. S30V vs S35V vs S90V just starts to fall into a crack in my brain.