I'm reading a book on "Christian Hermeticism" right now...called "Meditations on the Tarot". Ever heard of it? Despite its bizaare sounding title, it is quite reasonable, if not 100% persuasive to me. It has given me a new understanding of the heart of Christian esotericism, which I believe is aligned with many gnostic sects. In the book, the anonymous author makes the case FOR mainline Catholicism as true in the deepest senses, though, like everything else, it is made up of exoteric and esoteric dimensions.
I personally wouldn't go there. I am catholic, and I understand the mystic traditions both in the tarot (from my pre-Christian days) and as taught in the church.
There is a difference. And although there are moments where some ideas overlap, the journey is not the same.