The question is kind of ridiculous, since there is no such thing as a monolithic bear, just as there is no such thing as a monolithic man. Different species of bear present different levels of danger. A little Asiatic bear or black bear will probably run away from you if you appear threatening enough. A brown bear, grizzly, or polar bear? Holy shit. You are in immediate, life-threatening danger at the very onset of the encounter.
Men are also on a sliding scale, but with a range that goes far above and far below the bear for the level of danger. The vast majority of men you encounter on a trail are just there to enjoy the outdoors, not to savage passers-by. However, you never know when maybe that hundredth guy you encounter is some Ted Bundy-type freak who's going to drag you away and spend the next eight hours raping you face-down in a drainage ditch and then stitch together a cock cozy out of your eyelids or some shit.
Humans are objectively the more deadly predator than bears because of tool use. A guy could pop half a dozen charging bears with a rifle without breaking a sweat if he had enough of a head start, and if they close the distance, well, he could draw a great big fighting knife and put some gaping holes in them before he gets his neck bitten and goes down. That is, of course, not the absolute limit of the danger presented by humans to other humans or to wildlife; the upper limit of the damage a single human can do looks something like a manned fighter jet armed with a tactical nuclear warhead, but nobody's going to bomb a random forest with you in it for no reason, so we can obviously exclude this scenario. Make no mistake, humans absolutely do have the potential to be extremely dangerous, to other species and to our own. However, we are also a social species and generally don't prey on our own kind.
Statistically speaking, the man is preferable to the bear, because more likely than not, he's going to be an unarmed, low-T, Prius-driving liberal with a bald spot on top who's out on the trail to photograph scenery with his Nikon, not to pin down and rape random women. Even when you take into account violent crime statistics, in the vast majority of encounters with any human, you are not in any danger, because you're also human. However, there is also a risk of encountering the occasional, uber-rare psychopath or serial killer who has picked you as his next victim.
In any encounter with a bear, there is always a moderate level of danger that varies slightly depending on the species. A bear always regards you as either a threat or food.