The variation of them comes not from the lesser/butter gene, but the other multi-thousand of possible genes that we can't clearly label but are still there changing how the snake looks. Same goes for every other morph and even normals. This is like debating if bhb pastels are different morphs than lemon pastels.
Maybe I'm crazy then. Because when I look at the pictures they look like butters when you guys say they're butters. And then they look like lessers and then you confirm it later. I don't know. They have a slightly different appearance to me. But I'm a novice at this. Although I do enjoy guessing which is which ;P