Colcoch listed a string of virtues and skills which she put forward as criteria for the ordination of women to the priesthood. Her case is that as these criteria can be found in both sexes, ‘identical’ then that is sufficient for the ordination of women to the priesthood. 
Of course there are other arguments regarding equality as defined by politicians and secularists but the Church is not beholden to political and secular values. Then there are other ontological arguments which the Church cannot ignore.
Equality before God means that the souls of the just can gaze upon the Beatific Vision and enjoy the sublime, eternal happiness it bestows upon them in equal measure. This regardless of whether the were formerly pope or pauper, lord  or serf, master or slave, man or woman, Jew or Greek.
I replied to Colcoch but you probably haven’t come across it yet.