VM has more bit than #81, #7, #5 or #3 but not much more. It will remove light marring, spider swirls, etc with a polishing pad. #80 will remove up to moderate swirls, marring, etc. Definitely more abrasive than #80. It also finishes off real nice and wet.
#80 followed by VM then your LSP makes an excellent 3 step process that will leave your paint extremely wet looking.