I bought an atomic mulcher blade for my toro super rycycler 21". I switch them back and forth and I've noticed that the atomic holds its shape much much better than the toro blade. The toro gets all dented and blunt while the atomic mulcher gets duller (ofcourse) but it holds its shape much better, almost no dents. Is this just better steel or just my imagination? I paid $30 bucks for the atomic blade at home depot because it looked like a gator.