The rules in MMA protect the fighters far more than in Boxing, and although MMA looks notably more dangerous, it's actually far, far safer.
The gloves in ultimate fighting are designed to protect the hand. In boxing the gloves are designed to protect the opponent from serious injury. Oddly enough this seems to have the counter effect. The gloves in ultimate fighting allow for quick knockouts and superficial injuries thereby decreasing overall strikes to the head. The gloves in boxing tend to allow for more “jarring of the brain” over time thereby producing a greater amount of strikes to the head. This can of course, lead to a great many long term repercussions