I researched every forum thread I could find on this. Seems there's loads of people who liked one immensely, but the other not as much. Besides the angles, you also have to figure out what width you're going to want. Here's what I did:
-Put two smaller hex dumbbells on the ground to do pushups off of
-Try both angled and parallel configurations at the different grip width options. Black Widow has some wider options, Edge Fitness and Rogue have narrower options, and Elite has a variety, with a really wide option. Most of these have thick or standard grip options, that's not restricted to football bars. Edge has a combo bar that's just a football attached to a swiss bar if you really can't decide (look it up, pretty crazy looking). For me, I've narrowed it down to the BW football bar, but that's not in the cards until Father's Day.
Some people say to try dumbbell presses at straight and angled positions, but it's really not possible to get an idea for grip width like this. Good luck, and let us know which one you go with and how it works out to help out the other bum shoulder owners.