The power of religious belief is the power of hope. Religious belief provides a type of hope that few other beliefs provide. Atheism can not offer the kind of hope that religious belief provides. One of the "essences" of marketing is large promise...in that respect, God has better marketing than atheism does.
However...if truth has any value, at least in terms of an accurate, undiluted description of the thing being described, then atheism may have one ace up its sleeve that no religious belief has...and that's the truth itself...but only, of course, as long as there's no God.
However...if truth has any value, at least in terms of an accurate, undiluted description of the thing being described, then atheism may have one ace up its sleeve that no religious belief has...and that's the truth itself...but only, of course, as long as there's no God.