I also think Butter and Lesser are similar but not the same, for instance, A kingpin pastel and an emperor pin should have the exact same markings if they are the same, and, I'll give you that some of them are similar. But I've never seen a kingpin pastel with the awesome desert camo kind of look that I love about a good Emperor Pin.
Now if you bred a lemon blast female to both lesser and butter males and ended up with a yellowish tan snake with brown slightly blushed pinstripe markings and dashed lines on the back and sides... I'll admit you've have a hard time identifiying exactly what you've got.