Is Christian morality superior or inferior to secular morality? Why?

It seems to me that Christian morality ultimately falls back on what god wants, whether or not that is for the well being of humans, while secular morality is based upon what is the in interest of a human's well being.

It seems to me that morality which is centered around what is in the best interest of people is necessarily superior to one which as a foundation relies on what a god wants or (more realistically) what people reckon their god wants.