A good question, to be sure.
Hmmmmmmmmmmmm.
Well, Japanese RPG's do include Final Fantasy. Point for them.
But Western has Dungeons & Dragons. Many points for them.
Japanese have engaging stories.
Western has D&D.
and so on, and so on.....
I can't decide. I like them both. However, I do think that Western RPG's do allow more role-playing. You can make decisions and have those decisions not loop on you until you pick the right answer.