Only if you are looking to reinforce your beliefs. Otherwise, besides the above two strategies, you should look at which study has better methodology (though it

Only if you are looking to reinforce your beliefs. Otherwise, besides the above two strategies, you should look at which study has better methodology (though it's usually never trivial, especially not for us, bystanders), bigger sample size, stronger statistical power. If none of these seem to suggest a clear winner then you should just think that this is still undecided. You can also ask an expert. Choosing one and believing is basically just going with your suspicion.