#6 is a cleaner wax, with an abrasive level of I'd guess 1 or 2, which leaves a wax coating that offers protection. #80 is a glaze with an abrasive level of 4, which offers no protection at all, just cleaning and polishing action. They are entirely different products.
(edit) #80 contains a "paintable polymer" protectant that helps with protecting new paint while it cures.
I have some #6, but haven't tried it yet. I like the consumer cleaner wax, though.
Tom