Board Thread:Off Topic/@comment-26397825-20161205132101/@comment-26397825-20161208031233

Weiss alludes to Snow White through small things; the apple pendant of her necklace, being very high up socially, her leitmotif 'Mirror Mirror', and her name literally meaning White Snow.

Basically allusions are small cosmetic stuff, while the Character Basis is things like their entire background, their semblance, their weapon, their looks, etc. If you have tied every aspect of their character into something, it's a basis. If you've just made a few nods here and there then it's an allusion.