Hi Ben,
There is no comparison in my opinion. UF is definitely more prestigious and ranks higher than New Mexico across all levels. Also, Gainesville is a very nice place to live (I did my undergraduate there). Yes, if you want to remain in academia, the place you decide to go most certainly will make a difference. I am sure NMSU is a good school, but it is not in the same caliber as UF (top-tier).
Remember, the money they offer you up front isn't everything. You can later find ways to fund your education that do not include loans.
Just my 2 cents.