As far as I can tell, the Stainless rollmark disappeared around 2012. Neither of mine have them. Someone else may have a better answer.
There are still changes happening so you may never have one with *all* the latest updates unless you keep buying them. Not that there's anything wrong with that!
My 9C from around Aug 2013, came with:
1:10 barrel
No "Stainless" rollmark. Personally, I prefer this.
S Stamped Trigger Bar, now swapped for H.
Old style slide lock, now swapped with new style.
Old style sear now swapped with Performance center sear.
My FS9 (Spring 2013) came pretty much the same way but all I have in it is the new slide stop.
There are no aftermarket parts in either one.