I do not think in terms of better or worse, I think in terms of
what is. So if there is a God then it is better to be a believer but if there is no God then it is better to be an atheist because it would be silly to believe in and worship a nonexistent Being...
Since we cannot prove that God exists, it is just a matter of what people choose to believe or disbelieve. Frankly, I think it is kind of risky to discount the idea that there is a God because if there is a God then there could be repercussions for not believing in that God, especially after we die. So I think it is smart for atheists to keep looking for evidence that God exists.
If there is no God and we believed there was a God the worst that can happen is that we die and there is nothing... We might have spent or lives worshiping and serving a nonexistent God, but if we lived a good life doing it we have really lost nothing except that we sacrificed our own personal desires, other fun things we could have been doing.
I have been thinking about this lately, since I have sacrificed all my time for God and I see no end in sight. What is it was all for nothing?
Then I wake up and realize that is really not possible because of course there is a God and an afterlife. I sometimes just wish there wasn't so I could go back to having fun...