Comparative similarities can be observed by how each organization lures people into each other, one promises happiness by removing bad theta agents, the other promises to guide them to toward appeasing god, so he doesn't destroy them and to live on past Armageddon into a earthly paradise. In the mean time promises a state of happiness that they have found god's chosen channel for helping and assisting them to not get destroyed. They both have strong enforcement to what their members are doing and saying and will enforce their members to abandon their own family members who pose any objection.
All this indoctrination is accomplished by reading literature that the organization heads have published themselves, which have been intentionally devised for that indoctrination purpose.