Ok, I went to FSU undergrad, was accepted to but did not go to UF Law.
UF is absolutely the better law school, hands down. There's a reason it's referred to the Harvard of the South. It's a school with a national ranked reputation. When you look at the summer associate lists at major Washington and New York firms, you see UF grads, and no FSU grads (I'm talking law atm.)
For undergrad, keep in mind what you want to do. FSU is hands down the better communication school, EXCEPT for journalism. Journalism is UF's role. UF medical school is better and more established so if you're going pre-med and think you got the grades, that's a better place, but FSU med is easier to get into. FSU has one of the national premiere meteorology and criminology schools. UF has significantly better environmental studies courses and finance.
Also consider the town. Both Gainesville and Tallahassee are small towns. Neither has all that much to do. Gainesville has more bars, restaurants and nightlife stuff. Tallahassee, though having less nightlife, has more intense nightlife. There's a reason that FSU is a party school. At the bar that I worked at in tallahassee, it was packed wall to wall during weekdays. UF doesn't have quite that big of a party scene, but there ARE more places to go to party.
Both are fairly large sprawling campuses. Both have awful trafic.
UF has better basketball. If you like basketball, that might be a consideration. UF and FSU are both huge football schools. While UF has the better team, Football is a bigger deal at FSU...some would say it is life at FSU. I had a professor who got drunk and fell out of a window and broke his neck when FSU beat miami. (Ironically, in supreme court class). FSU football games are intense from the day before the game until the day after the game, whether it's the war drum, the garnet and gold girls/boys, the flaming spear society, chief osceola....
You might get to say you're last years national champions at UF, but the experience is so much more at FSU. Also...bobby bowden. Enough said.
If you're interested in ROTC, FSU is one of 3 (or 4 I forget) schools that have a battle streamer for ROTC, and is consistently ranked one of the top ROTC schools in the nation. It also has one of the highest amounts of combat veterans in any school ROTC program (as students, not instructors). The air force RTOC is consistently highly rated too. UF ROTC is ...less so.
If you're jewish, you might have better luck at UF, as hillel and JSU have a bigger presence. Fraternities are also bigger at UF (but realistically that's only because FSU attempts to suppress fraternities as much as possible). Sororities, however, are equally big at both places.
For undergrad, if you're on florida bright futures