Mine resembles the top one. Not as dark, but mine is not very big either. He has the nice crisp lines and long "Horns" on the top of his head. Definately dosen't look like the last two pictures.
It is a real shame we dont see the black or red volitans very often nowadays. Here is a volitan that I am trying to get hold of, they come from the red sea. Notice the "feather" shaped horns.
a friend of mine just got a blackfoot lionfish.... coolest lion I've ever seen has blue spots on the back of its fins.... but im pretty sure it ended up as eel food