User blog comment:Gliscor Fan/I'm gonna write a book, maybe/@comment-3051496-20160528023655/@comment-27019625-20160528023936

Eh, the vague concept is similar, but, the concept has enough wiggle room that the end result can be drastically different.

Especially since Percy Jackson is designed to ape Greek mythology, specifically. Adding in several other pantheons changes the results so much.