There really isn't scientific evidence to prove that God doesn't exist, and I will admit there's no entirely unbiased evidence for God's existence either. But then there also isn't solid evidence for evolution either as it fails to explain the origins of life and the world. Yet we are all still here somehow.
I believe neither. Atheism in my opinion is the strongest choice because it has the most evidence, but if those are the two choices, I subjectively side with Christianity, by pure personal choice.