User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-9703010-20131007153937/@comment-3146930-20131007175313

Generally we only make a Roman and Greek version of the same god if the god's two forms are vastly different. Or if the two forms each have a large role in a book (like how Bacchus is different from Dionysus). Aphrodite herself admits that even if the Romans called her Venus, she prefers to think of herself as Aphrodite because she didn't change. Hercules doesn't see himself as changing that much either.