I decided which medical school to attend over 20 years ago but have had extended affiliations with Baylor and Cornell and couldn't resist jumping in.
A couple of corrections/thoughts:
1. Both places have active MD/PhD programs. Cornell's is 15/101 students, and the tri-institutional program (Rockefeller/MSKCC/Cornell) has enormous resources. So does Baylor.
2. Cornell's match list is probably more impressive, though I'd guess that the most pertinent variable is that most of the most impressive residencies are on the coasts, and Baylor students are more likely than Cornell students to look at programs in Texas and the midwest.
3. Cornell is probably harder to get into, but Baylor is consistently more highly rated. Cornell could easily fill its class with students from just the Ivy League without dropping its average GPA below 3.7, and their admissions committee works reasonably hard to maintain diversity of background. Baylor does not get applications from virtually all the best Harvard/Yale/Princeton students, like Cornell does, but Baylor does get applications from all the best Texans and a nice smattering of really great students from around the country. In regards to diversity, both schools (like almost all schools) are somewhat geographically homogeneous. For Baylor, I'd underline that a third of the students are out of state and that another chunk are instaters who have had significant experience outside the state (ie, their classes are much more diverse than those of other Texas medical schools). For Cornell, I'd underline that the NY metropolitan area produces lots of types of people.
4. New York is unique and better than the movies. If it's real outdoors that you want, an hour or two on a train will get you to beautiful beaches or mountains.
5. Houston is NOT hot and humid 9 months a year. It is unpleasant--to me at least--in July and August. The rest of the year is quite nice, and I enjoyed the opportunity to play tennis in January and February; try that outside in NYC in the winter.
6. Houston has more culture than is being reported in this thread. There are few medical students who are going to be more artsy than the offerings.
7. While there are quite a few Texans who are hyperChristian, hyperconservative, hypermaterialistic, antigay, and fearful of all things foreign, they tend not to congregate in the Texas Medical Center (the biggest medical center in the world).
8. Match and future career have almost everything to do with you rather than with whether you went to one of these two schools.