Best I can determine, the "Pearl" Corn is a form of Amelanistic Lavender. I see some distinct variation in the Opals whereby some are definitely pink in color, whereas others look pretty much like regular Snow corns. Even with the Lavenders themselves, there is a marked variation in how they look, with some looking kind of brownish colored (aka "Mocha") whereas some look a lot like odd looking Ghost corns.
To give you an idea of what I am referring to, I have attached a couple of photos of some Lavender Motleys. Notice the distinctly different look in this one clutch. Also notice the eye color. As far as what exactly this means, beats me. From what I have seen, they both turn out looking pretty much the same as adults, and I don't mark the records as to one being grayer or browner as a baby. :shrugs: