The Virgin Mary is the Goddess in all but name, she is the Goddess archetype - the divine feminie, intuitive, nurturing etc.
The statue of Mary that I light candles for in my local Church sometimes is the same Madonna (Mother & divine Child, god-king to be) figure that Isis was depicted as in ancient Egypt, which the Romans later adpoted into their own multifarious cult system. Compare photoes online, they're easy to find.
Mary also has all the old pagan titles and trappings of the Goddess - Queen of Heaven, Immaculate Virgin etc.
So there is little practical difference, beyond the conceit of the Priests that she is in fact
not a Goddess.
But Churchmen are expert at dissimulation, as anyone who has read the Catholic Encyclopedia with discernment will agree.
To understand how the patriarchal version of the Goddess & God redemption story pans out, read
Jesus and the Goddess by Timothy Freke and Peter Gandy.