I don't have any idea of what you're trying to say here. Explain to me why the fact that KH has Disney worlds matters at all.
KH is a universe of worlds in multiple dimensions (Realm of Light, Realm of Darkness, Realm of In-Between, Realm of Nothing) while FF is typically one world, three in FFV. Hell yeah, they aren't in the same category. KH is a much bigger universe, making its ultimate power source much more significant than the ultimate power sources of FF.
FF is still only a couple of worlds, and KH is arguably a multiverse.
Not to mention that I'm mostly comparing final bosses, not the worlds themselves.




