Myself and my friend are in this same boat. I was having an incredibly hard time with the decision, weighing all of the pros and cons that we both could come up with. (By the way I know people who go to UTSW who say the gunner rep is totally false, so I don't buy that argument.) But in the end I went to go visit both schools for extended weekends over my break and we have both decided to choose UTH based largely on the following.
1. Feeling for the city. Yeah it is only 4 years of medical school but what if that doubles/triples with residency. I know it isn't a guarantee but we notice in the match a lot of SW students stay at SW and UTH students stay in TMC.
1.5. Some of the best state residencies are in TMC, all the specialties you can imagine are there, it is after all the biggest medical center in the WORLD. Networking anyone?
2.
Rankings based on research money, not necessarily the quality of professors, and clinical opportunities. (Hard to argue that UTSW would have more opportunities than TMC, or even half as many for that matter)
3. The residency match list. If UTSW truly is such a better school why are the match lists virtually identical, or in terms of sheer numbers
UTH actually appears to put more students into "better" specialties. (I know I talked to a SW student who said many students there tend to want to go into internal medicine which could possibly be the cause for this, I obviously don't know for sure).
4. Minor reason, but the tuition is almost 3,000/yr cheaper in Houston and the cost of rent is significantly lower and in a safer area.
5. I don't have a 5th of the top of my head, 4 was just a weird number. But seriously, the school is way "nicer"
Obviously people could argue with some of our reasons but this is just my two cents. Take it for what you will. UTSW also has many positives I didn't list out here but I am sure you can't pick the "wrong" school. But as so many people say, don't fall into the trap I almost fell into and list your schools purely based on their rankings, comfort and happiness is med school can't be under estimated. Good luck with your decision!