Four letters are radically different: H (the ASL '8'/'horns' handshape), J (a swiveling Y rather than I), X (uses two fingers, like a flexed ASL V), and T (just like the French F, but with the thumb on the inside of the index finger instead of on the outside).
Four letters exhibit distinct variations: H (utilizing the ASL '8'/'horns' handshape), J (featuring a rotating Y instead of I), X (employing two fingers, similar to an ASL V), and T (resembling the French F, but with the thumb positioned on the inside of the index finger).