I imagine they look like a Super Mojave. The BEL seems to visually eradicate any other morph with it. The only ones I have seen where you could visualize the 3rd gene in a Super Mojo BEL is Pastel or Hypo, and that is only because of the head spot. Well, Albino also removes the head spot and makes they eyes red (Cherry Bomb).
I've never seen one, but also agree with it supposedly looking like a super mojo. Under a black light, the pin pattern should show up though. You might even be able to see it very very subtly in regular light too.