There isn't a better job in the country than Texas FB.
What does Texas Football has that Alabama Football doesn't? I can think of a lot of things that Alabama Football has that Texas Football doesn't.
Maybe my opinion is bias given I don't know a lot about the state of Alabama. That said, Texas is growing faster than any other state in the nation, has an already huge pop, has a lot of money, and a large portion of that population would do whatever they could to their children to make them good at football. Other than the growth thing, this may be applicable to Alabama too.
Alabama does have what is viewed as the better conference and is viewed as the pinnacle of athletics right now, but Texas is primed to match that quickly if someone like Saban took over, imo.