Comparative religion: Spira vs. Thedas

tklivory ask me to compare and contrast the Maker (Dragon Age) and Yevon (Final Fantasy X), which is a fantastic question. Two god-figures, two religions, two metaphors, two cultures. More different than alike, but with a similar founding principle: protecting the planet and the people while attempting to harness and control its world's greatest power. How do these two gods manifest, and how do their similarities and differences shape their respective worlds?

( Very long, lots of spoilers, including for DA: Trespasser. )