I agree that models for the overall development of the universe are a lot like models for global climate change. The scale is vastly different, of course. But I bet that the relative cell sizes in our models are similar. Because they're running on similar machines.

But the goals for a theory of gravity, and its integration with QM, are totally different. Or at least, that's my perhaps naive opinion.

Edit: That is, relative cell sizes and total cell counts.