Yes, it looks like lesser, butter, mojave, phantom, Vin Russo high yellow diamonds, mocha, hidden (makes platy with lesser), special (makes crystal with mojave), and several other unnamed newer animals are alleles of each other (i.e. different mutations of the same gene).

It's also looking like there could be several other separate allele complexes (yellow belly/specter/whirlwind, cinnamon/black pastel, and maybe even fire/flame hypo/sulfur).