There is no such thing as more high quality than a real note. The goal of counterfeit money is to pass as real money. If it is "better" than real money it can be told apart. Man made diamonds are less flawed than real diamonds, and this lets them be identified by skilled jewelers. Supernote can be identified as well, but only by top experts after very careful examination. Very unlikely this guy has supernotes if his bank identified them.