I'm not a huge fan of either program. I don't know all that much about OU's planning curriculum other than they have it in the college of architecture, indicating a more design-oriented degree. UTA has all of their urban affairs wrapped into one department, which gets you a little more of an interdisciplinary degree, which means it probably emphasizes policy. It also has dual degree programs. If I remember right, UTA is accredited for urban planning. Though in a completely different department, my brother went there for a Master of Engineering degree and complained about the lack of personal interaction with professors. I looked at UTA as a grad school possibility, but some of my professors advised staying away from it. You would also have to live with the fact that it's in Arlington Texas, poster child for suburban sprawl (OK, that's just my personal taste coming out). One advantage that UTA has over OU is that UTA is in a major metropolitan area. There are countless cities around that area for internships and hands-on research projects. Also, many of the urban planning consulting firms in Texas are located in Dallas.
Basically, there are many other schools in the midwest that offer MCRPs. Don't limit yourself to just these two (it sounds like you probably have a few more acceptance letters coming anyway).