[mrguyorama]

>mainstream but equally supernatural religion.

Scientology is verifiably and comprehensively different from most other non-cult religions by virtue of how it treats it's members and encourages them to act. Only one other religion of note has such "High control group" style features as discouraging psychiatry, discouraging interaction with non-Scientology family members, forcing through threat of blackmail members to do things, threatening the IRS and getting away with it, and generally treating members as resources.