Hm, I'm no Kaba expert, but as far as I remember, Quattro and Gemini existed as "T" and were modified later as "S" resp. "pluS". The difference I know of are the shapes of the pin heads, in T "normal" pins, in S the "zoo" of pin shapes (flat, pointed, staged,...). I don't know if these are all modifications (as I said, I'm no expert on Kaba).
What did you mean with "new"?