As someone with your situation of deciding which offer to accept, my thought process might shed a little light. (Ultimately I have chosen Air Force, but I could definitely see someone with different personality/goals going Annapolis). It's sort of like MLB/NFL: I like both, but they have different charms for different people.
Surrounding: I like being in the mountains on a wide open campus with a big sky above it, but Annapolis (just look up some YouTube videos of it or something) is really, really cool. In fact, hopefully I can do an exchange semester once I'm 2nd or 1st class to experience the city. And, Annapolis definitely has the more beautiful buildings on campus in my opinion.
Culture: Navy guys think it's hilarious that the Air Force guys know exactly when their deployment will be and that everything is scheduled 5 years out (not literally but that's the idea). If you like structure and order, Air Force. If you like getting the job done by any means necessary, Navy.
Careers: I have heard that Navy has lots of different "communities", and you find the niche where you want to spend your career. Sub guys and the ways they work are totally different than SEALs or SWOs, but you build a sort of close, fraternal bond. Air Force is more consistently the same across the different disciplines. One factor in my decision is the opportunity in the Space Force and how cool it would be to really lay the groundwork for the branch of the military that may be the backbone of our future wars. In case you haven't seen it, there's a detailed rundown of AF careers and requirements in the AFOCD:
http://www.milvet.state.pa.us/DMVA/Docs_PNG/hro/AFOCD.pdf
I'm sure someone here could find you the equivalent for Navy. Just see if you would be happy with your first, second, third...
nth pick in each list.
Uniforms: There's cool ones at both, I wouldn't sweat it. My little sister even likes the USAFA dress blues better than USNA summer whites
Academics: Probably not much of a difference in quality at all, if any. It's just a matter of what you're interested in. You've certainly looked those over before I'm sure. So, that's just another personal factor.
Personalities: This is what a lot of the folks here were saying - see if you can find the people you fit in with. I know several graduates from both academies, and I tend to follow the patterns of Air Force guys more. USNA grads are pretty easy-going, cool, and funny. USAFA is a little more straight-laced and straight-forward. It takes some of both for the military to work, but the branches definitely tend to lean towards one way or the other.
Bases: Navy is obviously going to be near... you guessed it, water. Usually around water is a city, so if that's your cup of tea then that's a bonus for Navy. I would personally prefer a more medium-sized, spread out city like Dayton or Tucson. With a golf course naturally
Overall, just to sway you away from the dark side
I will say that the graduates of the Air Force academy (and just Air Force people in general) tend to be closer to 100% in support of their branch. It seems like the USNA grads are slightly more along the lines of "you'll get a good education at either one and do great." There's obviously pride in their branch, but it does seem like more sailors would rather be in the Air Force than airmen in the Navy. Hope you can make a decision that you're confident in and excited about!