While there isn't a consensus on the whole "are butters and lessers the same?" debate, they are close enough to make this easy:
If you can find a higher quality butterbee than any lesser bees you can find, get the butterbee.
If you can find a higher quality lesser bee than any butterbees you can find, get the butterbee.
A high quality butter will outshine any average lessers, and vice versa.