They're both "new versions" of fundamentalist sects. Despite the Mormon's having a brand new holy book, the movement, like the Taliban's Wahhabism seeks to return to the "original" version of it's religion.
Then of course you can draw parallels to it's rejection of the modern world and pop culture, as well as it's history of violent militancy to support itself. When you want a theocracy, your religion generally endorses violence to get such a thing.