Griz or black, here's the general rule.

If you are wandering around and come across a bear and startle it, do not run, do not confront, veer your eyes away and slowly back away. If you do get attacked, play dead. You are a perceived threat, and the bear will likely leave once it feels the threat is minimized.

If you are being stalked, do not play dead, do not run. You will have to fight or otherwise intimidate or subdue the animal.

The best response is still to discharge one of those fire extinguisher sized pepper spray tanks into the face of the bear. Regardless of motive, it is the best detterant to an attack(short of a well placed belted magnum round in 375 or larger caliber).