Auburn and Tennessee played in the 2004 SEC championship game, Tennessee hasn't been back since. In 2008, both programs took a nosedive and fired their coaches, both with at least ten years at the helm. The difference between the two programs since then has been Gus. He was there for the three best years of the Chizik era, and came back and instantly made Auburn relevant again when the bottom fell out in 2012. Tennessee is on their 4th coach in that time frame - none as successful as Gus at Auburn.
I live in Chattanooga, grew up here, and returned after graduating from Auburn. In my sixty years, I've never seen Vol fans this down. They would kill to have Gus as their coach, and many have said so. I know we lost to them last year, and it hurt, but most here in Tennessee see that as a fluke day where we played our worst and they played their best.
I honestly think that Fulmer hired Pruitt instead of a more qualified coach as a way of finding a back door to be the Tennessee coach again. I think he'll let him flounder through the difficult first half of the season (Georgia, Florida, & bama), fire him and appoint himself as the interim head coach for the less difficult last part of the season (UCSe, Vandy, & Kentucky plus a homecoming patsy). When the team looks better against weaker competition, he'll be the coach again. If you think that this is too far fetched, remember how he got the head coaching job the first time when Johnny Majors was out for heart surgery. Fulmer is a snake.