It occurs to me that my reply is a little too qualitative, so I'll try to put it into the language of probability. I have a prior on the idea that aliens created us; it is very low (maybe 100,000:1) but I feel quite certain that the proposition is physically meaningful, and if you handed me evidence I would gladly update in that direction. On the other hand, it is not immediately obvious to me that the idea of a supernatural god is physically or indeed logically meaningful. I'll still grudgingly quote you a prior, but with a sinking feeling in my stomach.