BEL differences

[KKM]

I know this is asked a lot but most of the threads I’ve seen about it are outdated in terms of the genes that are available. I was under the impression that lesser/butter, russo, and mojave (sort of) were the only ways to get a pure while BEL, but I’ve been seeing some other morphs recently that look the same but have different names (bamboo etc). Are these actually new, or like lesser/butter in that they’re the same gene as another morph but a different line? Also, which combination makes the cleanest BEL? I’ve heard super lesser/butter but I have yet to see one in person. Most of the lesser mojaves I’ve seen have some sort of light shading from the mojave, but perhaps I just haven’t seen a good one. How do super russos compare to the others? That’s what I have and I think he’s pretty darn white, but again that could be due to my limited exposure to different BELs. Also, do other genes (spider, pastel, etc) coupled with BEL enhance or detract from their whiteness?

I know these are kind of subjective questions but I’m just curious as to what the 2019 consensus on this is