They look similar, but they only carry a genetic similarity by name "Clown Sweetlips" or Harlequin Sweetlips --- Plectorhinchus chaetodonoides
They need a min of a 200 gal aquarium and can be difficult to feed as juvies. From what I have read they are not the best selection for a reef tank in that they will eat small snalis, worms, ornamental crustaceans and even serpent stars.
They look great, and I almost bought one as well...til I read about them.