Well I'll give you guys a good example: I have a bumble bee and I was looking for a butter fire for my bee. Now according to WOBP genetic wizard (its my only source of figuring out what i'd get), if you mix a bee with a butter/fire it will get totally different combos than if you'd mix it with lesser/fire.
That draws me to a conclusion that butters and lessers are not the same thing. I know this isn't the best argument but at least you can see the difference for yourself.
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