Simple, and yet not simple. Either we are alone in the universe or we are not. Whichever option you choose to evaluate leads quickly to awesome conclusions. The God option brings a lot of responsibility with it, and is possibly more complex than the Sagan option.
It's possibly more complex in this way: If we are God's only creation, we have a lot of growing up to do, a lot more than just trying to qualify for membership in some Galactic Federation. At this time it appears that we are alone in the galaxy at least.