How World Faiths Compare to Christianity So What's the Difference? has been revised and updated for the 21st Century to help Christians better understand their own beliefs. A classic first released in 1967, this revision takes a current look at the answer to the question, How does orthodox biblical Christianity differ from other faiths? In a straightforward, non - critical comparison, Fritz Ridenour explores and explains the basic tenets of Roman Catholicism, Judaism, Islam, Hinduism, Buddhism, Jehovah's Witnesses, Christian Science, Scientology, New Age and Mormonism.