They're really two different animals, as R/R is a permanent hard coating (that says it penetrates the plastic), not a treatment. My front had some areas that flaked off as I mentioned from abrasion from airborne stuff, but everywhere else was fine. I just didn't apply it correctly first time. I'll never have to do it again now.
Wish I'd tried the B2B on my gasoline stain last year. I can see where that kind of product could kind of dissolve the gasoline. Now mine's covered with R/R so nothing will penetrate...so my "gas tat" stays.