i think tail patern is the way tell these fish apart. imo the black, red, and black trim on the tail is the vittatus. also the vittatus as a juvy shows these colors and is way more aggresive than any other species. the brevis shows little to no color on the top piece of the tail, while the bottom can show red or yellow. the batf or fatf is more skittish and flighty as a juvy. i think all the atf species are good fish to own so i wouldnt mind gettin my hands on any of em.