There is no difference whatsoever so don't for fall any marketing ploys claiming one is more costly than the other. I had someone once tell me "I have a Lesser that looks like a Butter"... There was also a $100 difference in between his Lesser's and Butter's.
I have hatched enough Lesser's, Butter's, Butles's, Lesbut's, whatever you want to call them, and have seen so much variance from one sibling to the next, that I can say it's all the same.
I also feel the same about Cinnamon's & Black Pastel's, het Red's & Green Pastel's, Banana's & Coral Glow's, Paint's & Sentinel's, and a couple others I can't think of right now.