I sent an e-mail to p21s asking what the difference was between s100 and p21s.. I didn't ask for chemical differences but I guess that was the impression that he got.. I thought since the p21s product was more expensive he would be happy to tell some differences between the two (make the s100 users sway towards the more expensive products for their cars)..
Anyway here is what they said:
All I can tell you Adam, is that there are some differences in the two waxes. We are not allowed to talk about chemical make up of the waxes (I'm sure you understand that).
Both will work on either car or motorcycle and are totally safe for either application. I'm sure this debate will rage on for some time. Thanks.
Kind regards,
P21S Customer Service