A jacketed hollowpoint is the last thing to use on a grizz.
I agree, I wouldn't chose a standard pistol JHP bullet for grizzly bear.
The OP is talking about BLACK BEAR, which is a smaller somewhat different bear.
A large boar black bear in Arizona can be in the 350lb range. 250lbs for sows Exceptions exist, but generally a black bear is about half the size of a grizzly bear.
With correct bullet selection and proper bullet placement, both the .357 and the 10mm will do the job. The key is proper bullet placement. And that is entirely dependent on shooter's skill, ability and knowledge.
Bears are not armor plated but their skulls offer round bone bullets CAN glance off of. A bear's vital organs are inside a shaggy sloppy fitting bear suit and aren't quite where most people expect just from looking at the bear. Study bear anatomy, seriously if you think you may ever need to stop a charging bear.