If I had to make a distinction between N and S sarcasm I would say:
- Ns love the ironic sort - which is more to do with observation, individual wit and cleverness. NTs particularly seem to like very dry, witty, (sometimes caustic) irony
- S sarcasm seems to be based on interplay and mutual understanding (eg. "No, really? I never knew that.) And perhaps you might say it is more good-natured.
I'm extremely sarcastic... inside my head. It actually gives me goosepumps when I can let all perverse stuff out in somebody's company who I know will not be offended by it. Psychos, all of us I bet - just nobody knows.
INTJ/Ps seem to be very openly sarcastic folk that I've noticed