The change is very subtle. It doesn't seem like they intended it be to two different colors, rather "fleshing out" what's already there. Regardless, I think it'd be very nice if we got color options... It would probably be a thing in the future after they've finished adding jobs, but I'd love the option to choose between this yellow and that pearl, and the option to get the male xaela's black on female, and the female xaela's blue-black on male.