It depends on your program of study. UNT is a much smaller school with fewer faculty, but they have a strong Community Health program, and a lot of interesting social/behavioral-type research projects within the Epidemiology department. Fort Worth is also a great city (all the amenities with a small town feel), but you'll find many more opportunities for work/research in Houston. You can also very easily find practicum/thesis projects in the Texas Medical Center if you're interested in infectious diseases, clinical-based research, or environmental science. I'm not sure about the health administration or biostatistics programs though (although I assume they are both pretty good).
Also, since UNT is right next to TCOM and the GSBS, I imagine you could probably find clinical-based work/research there that might interest you.