Personlly id suggest getting a Mojave if you want a BEL... Simple because i think the Lesser x Mojave make the whitest bell (or Russo x Russo) But with Mojave x Mojave you get the dirty BEL and Lesser x Lesser sometimes gives goldy lines or Bug eyes!
And no because they are not the same "family" of co-dom youd get fires/lessers kinda of deal. Just get yourself a second snake =) if you want BEL!