I don't believe so. I played Ninja Gaiden Black on Xbox and it punished the hell out of me on Normal. I only had a hard time with a few of the bosses on this game (and, of course the black hooded alchemists). I'm playing through Hard now though and it seems like the same challenge level as Normal on Black.
I may be branded a coward but I'm pretty close to reverting back to hero mode. Even the first boss was giving me trouble and I never had this much difficulty with warrior on the first two. If there's nothing to unlock on higher difficulties why punish myself right?