Divine Soraka only has a different texture and splash, no new animations, model animations, sound or spell effects.
Shouldn't this fall into the 520 category?
Don't get me wrong the texture looks amazing, but that's all their is to this skin.
Divine Soraka is probably a 750 skin. The 520 category is usually recolors or really minor model changes, and Divine Soraka has major changes to the model. I have no idea what it is priced at the moment, though.