So if two woman both decide not to have abortions, one who believes God commands her not to, the other for her own reasons. Why do you feel that that woman who believs in God has some moral superoirity?
Because the woman who did not have the abortion because she listened and obeyed God's commandments, did so explicitly, which is right. She obeyed the two greatest commandments which is always and absolutely right. The other did so for some other worldly reason which was not defined in your hypothetical. Anyway, just because the outcome is good (The child survived) does not mean the decision was was based on correct moral logic. Anyway, where do morals proceed from anyway, but God, the absolute good?