there is no difference between butter and lesser, its just two names for the same thing. once you combine them, you cannot tell them apart, and only your personal choice determines if you call them butters or lessers or lesser/butters. if there once has been a difference, it is now meaningless because years of re-labeling and recombining did a good job of mixing it up. BPs where the owner can no longer trace it back to either of the original line are being used for breeding, producing more BPs that cannot be clearly traced back. there are no visual differences, so unless your records of anchestry are complete and go all the way back and dont contain lesser to butter breedings, you have absolutely no way to know for sure.

there is some difference between black pastel and cinnamon: super black pastel is somewhere between dark grey and black, and super cinnamon is somewhere between dark brown and black, and the 8-ball is halfway inbetween. the single-gene offspring may be difficult to sort out, but it should be possible. here there are visual differences, and breeders manage to sort it out even if they do black pastel to cinnamon breedings.

it has already been mentioned, there seem to be known issues with both breedings:

super lesser / super butter / lesser butter: sometimes small eyes / bug eyes.
super black pastel / super cinnamon / 8-ball: quite often duckbill, a characteristic head deformity, very rare cases of spine issues / kinks.