I certainty do share the Faith called "Christianity" with the Mormons. In fact, every one of them who I have known personally, without exception, has been a fine example of a Christian.
You share some tenets with them, no doubt. You do not share their faith. You no more share one faith with Mormons than you share one faith of "Yahweh" with Jews and Muslims. There are endless interpretations of the bible and to some degree each man his own faith. They are just clumped into groups that wish to worship together around more general interpretations which form individual religions/faiths/sects/cults/covens/whatever.