A:
I know this is a late answer, but hopefully it will help others looking with a similar question n mind.
The "S" nock actually has a slightly larger peg than the "Super" nock, making for a much tighter friction fit. If you have arrows in which the "S" nocks are relatively loose in, these will not be too loose and will be prone to losing alignment.
Answered on 1/4/2012 by Dragonfly from FL