you can rank the BEL genes based on how powerful they are.

bamboo <--- insanely powerful
lesser / butter <--- these two are the same, and very powerful
mojave <--- weaker, the super form has a grey head, can be used for non-white combos like mystic potion or purple passion
mystic / phantom <--- even weaker than mojave, the super form has color and pattern

if you go for the weaker genes in the BEL complex, you will get nice colored and patterned combos.