Tennessee has somewhat better access to recruits I think. A good coach there should be able to do reasonably well, not well enough for its fans though, The current situation is an attempt to use a "gimmicky" offense in a sense to traverse issues with core talent. That can make them dangerous, like Georgia Tech once was, but cannot sustain elite performance.
Nebraska might get a Paul Johnson kind of coach and offense and start winning 9 game a year on average, but that is the limit.