Actually I think those are their production names or something like that.
I know SN95 at shows has always been set up to include from like 94 or 95 all the way 04 (leaving out the New Edge group) There's too many of those cars to bunch them up and at our club's show we actually separated them last year. I'm hoping many other shows will follow. Its like having the S197 Mustangs with the 2010+ Classes....yes they are very similar but still different and deserve their own class.