a supplies detailing website, they sell both p21s and s100. I have just ordered some s100 and p21s , and am not convinced the wax is the same, quite different in colour.
s100 and p21s are the same. One is marketed to the show car owner who will buy more expensive stuff, and the other is marketed to the motorcycle owner hwo is a comparison shopper.
If you do a search, I posted my convo with a rep of Brookside Import.
Comparing 3 pots side by side and brought a different times of p21s there colour is identical, next to two pots of S100, the colour is different. Am going to buy another pot at the weekend to compare that.