I am like you, the grade Bs usually have "odd" markings that really make them stand out, where grade A is like the Purebred version that has the perfect markings and all look very similar. I am partial to the grade B Naked Clowns myself. They are not completely naked, they usually have 2 white dots under their eyes on their cheeks and a white dot on the very top right in front of their top fin that makes it look like that have a saddle on to ride the fish. lol.