I knew I had answered this question before,
. Just didnt remember, i made a search back on the thread and found this:
The "S" is there to distinguish between the 11.9mm and the 11.5 mm crank
The "C" is there to distinguish between Steel Rear Bearing and Ceramic Rear Bearing
The "T" is there to distinguish how worked up the crankshaft is. See these pictures:
"T"
"Non T"
Hope this helps. This is what I know, someone please correct me if im wrong.