Judging by the Mule Team knives, I'd say it has quite a bit less wear resistance than S90V when used on hard/abrasive materials. It stands up great for what most folks would call normal use, and it is easier to sharpen, but it doesn't handle demolition work as well. My beater S90V Millie is getting pretty worn, and I was considering a blade swap to both restore it and put the M4 Millie on a much needed diet, but I just couldn't bring myself to give up all those v anadium carbides.