So how did you run the tests? just using sss and noting the amount of beading after each wash? just curious.

i only ever use sss on the pre wash through the foam gun and then follow up with something like pb super slick n suds or dodo btbm in the wash bucket. i don't find the sss slick enough in the wash bucket. other option for me through the foam gun is the megs hyper wash. but as you say is a fair bit more expensive than the sss.