Can't really say what the Victorinox blades are.....they are usually seen advertised as having "INOX" steel blades....but that is just the European term for Stainless steel. In the case of the Chicago cutlery blades, wasn't aware they make stainless ones, so can't comment on that, although I suspect you are right in that they are 420 junk steel. The carbon blades are 1095, which is a pretty good steel; it's been used in this country for over 100 years to make knives. Almost all military knives/bayonets were 1095 until recently, as were many fine old factory/custom knives.