I'm on JL forum, a few have both. Onroad, Bronco wins. A few more gadgets than jeep, but jeep can have more gadgets based on trim. Power, bronco, although you really cant tow much more if any. Sturdiness, which was odd because three dual owners mentioned it, the jeep wins hands down. Most new bronco parts/stuff, looks and feels cheap.
Offroad, without a doubt, jeep, even in a basic sport level, beats the toughest stock built bronco. The rubicon version, not even same league as bronco, bronco has a few iterations to go. No one really compared IFS, said it really didnt matter much.