1) Which universe are we living in? (give reasons for your answer if possible)

2) What do you think would be different about this universe if it were one of the other two instead?

Obviously if you think this universe doesn't fall into the false trichotomy of the OP, fill in the blank and elaborate.

Well, clearly most are going to think our universe looks most like the universe they believe in. By my view, we're living in a universe driven by a nascent spiritual weight that's beginning to emerge. But a more useful model for me is that of a natural universe. There are a few things that I wouldn't have expected of a natural universe that I would have expected of a mystical universe, but then there are also a few in the other direction, and my subjective bias leans toward the former while my rational thought leans to the latter.

A universe of the Christian God? That could vary enormously depending on the interpretation. In general I'd say something like a children's cartoon, with cartoonish villains who follow "evil" for its own sake but never do anything truly vile, and other people who are good the way only flat characters can be good, because there are no deep conflicts that make morality such a tangle to deal with.

Of Allah? I don't know especially much of Allah, but my impression is order. Sunny, strictly controlled areas of civilization, well-developed and complex but rigid, with most people in them having no desire to break the rules. And then areas of wilderness where beast-men do unspeakable things in the shadows.