Well, I'm not as cool as I'd like to be. I missed JAD's reference, and I can't read HCM's top port cover.
I'll just put my bowie away and slink back inside.
And, I can COMPLETELY tell the difference between a 228 and 229 with my eyes closed. I'm weird that way, I guess, I love the 228, but strongly prefer the stainless slide 226. Just a balance thing for me...