Other then the obvious im not sure . Stainless steel does not need to be treated to protect the metal so it's just an added expense . Most barrels and or gun parts are blued or otherwise treated to protect the metal from rust , corrosion and what not . There is no need for that and it looks cool too.
As of this date 8-18-14 at 6:42am I became a proud grandfather I guess I'm officially old