[The next reply doesn't come right away. In fact, it's quite awhile before Komaeda gets a response.]

The most significant thing I can think of would be the world crystals themselves. They were huge, housed in temples that protected them across Crystallis. Movable, yes, but still huge. If those crystals were ever discovered hidden or buried somewhere, that would make the most convincing argument that Vaikuntha evolved from Crystallis.