now how clean those BEL would be would depend on the genes they get, if they got lesser x lesser gene they would be pretty clean, if they got mojo x mojo genes they would most likly have the dirty head, mojo x lesser ive seen go both ways.
now you asked what would happen if you bred two BEL that were lesser x mojos?
25% lesser x lesser
50% mojo x lesser
25% mojo x mojo
now could you 100% tell the difference between all of them... probally not. is it a lower lesserxlesser or a mojoxlesser, is it a lower lesserxmojo or a mojoxmojo... i donno how you could tell.
Mojave x lesser leucistics are very white. There's no way you could mistake one for a super mojave, or vice versa. I think you would have a hard time telling the lesser x lesser leucistics from the mojave x lesser leucistics though.