Granted, the distinction isn't completely binary, as you can restrict access to modes that are difficult. But I still think that the distinction is productive. Disney's restriction does still fundamentally allow access to the material, while China does not.
But they don't have to - they could banish Mickey from the world if they chose to. Copyright allows them to do it. Is that wrong?
I think it's more about who created the information - copyright is about controlling things you yourself create. Censorship is about controlling access to things other people created.