Tuberville would be seven years older (54, turning 55 during 2009 season) than Jackie Sherrill (47 turned 48 at end of 1991 season) in his first season as coach at MSU. I'd see Tuberville as more of a caretaker than anything else. Sherrill still had the fire in the belly in the 1990s.
Also, 2009 would be Tuberville's 15th season as a head coach as opposed to Sherrill's 14th in 1991, but I don't think that makes much of a difference.