Well $1 goes a lot farther in Tallahassee than it does in California AND they are offering more. I don't think the money will matter that much though?
UCLA doesn't have qualifying exams if that entices you. It sure makes it tempting to me. UCLA and FSU also have great college sports (and LA has major pro teams) so to me it'd be between those. I think I would have a hard time living in such a big city. FSU has name recognition in the southeast and UCLA is pretty well known everywhere.
I'd probably pick UCLA.
Edit: Would you mind posting your stats? # of REUs, GPA range, GRE ect? Nothing that you feel would identify you but UCLA and FSU are on my list of schools and I am curious where I stack up