I forgot to mention, I only used the Meguiar's clay because I had it in my garage. However, At www.topoftheline.com, they have their own clay and solutuion. I have theirs too but I haven't opened it yet. I have to use the Meguiar's one first. If you do buy something from them, they can answer all your questions about clay,detailing etc. I think no matter whose clay system you use, it all does the same thing. Whether or not one is more abrasive or not, remains to be seen.