Can't really compare Bloodborne to Ninja Gaiden, my man. Nioh, sure, but not Ninja Gaiden.
Nioh is the better game, I agree. More content, more depth, more replay value... But, I must say, Nioh probably wouldn't exist in it's current state without the Soulsborne games. There's a heavy, heavy influence there. It borrowed so much from them; the stamina system, recollecting souls, certain gameplay mechanics...