Finish?? I have both with no care in any small difference in metallurgy. Our ruger MKIII are blue , Mie with a 2lb trigger kit , wifes with fire sights. That's it. I grew up in south flrida and loved to hunt in the rain and never put any stock and trade in guns rusting. I mo-ron can let a SS firearm rust with lack of mantainence. I heat treat all my firearms with a synthetic oil and with normal cleaning and lubeing they become more rust resistant with time. Guess I am old enough I prefer blue and the wear that shows with use but ain't gona turn down a deal in SS and that's what my current CC pistols are more cause they don't offered them in blue !