Some of the pictures were pretty tricky, I think identifying one that you had glassed in the field would be easier. The shoulder hump is pretty tell tale and some of the pictures did not have a shoulder shot.
This is all theortical for me though never hunted in a region that has both species.
It's all theoretical for me too - I've never positively seen a grizzly. I might have seen one once when I lived in Banff, but I'm not sure. There was some decent Black Bear hunting around home, but I was never successful, and I refused to "get in line" at the dump for a shot at a garbage bear.
From the books that I have read, there is a lot of importance in knowing every nook and cranny of your hunting territory as well as the animal that you are hunting. So scouting as much as possible, just walking the land, will give you a good idea of what's around the corner or what's on the other side of a hill. Which can be very beneficial.
Making your own maps of human and deer trails, and different types of foliage such as group of pines,...