That's the thing about the SEC. Even the "wide open" offenses run the ball more than they pass it for the most part.
From the 2008 season, here are the run/pass ratios in the SEC (rounded to the nearest number):
Alabama - 63/37
Florida - 62/38
Ole Miss - 60/40
Vanderbilt - 60/40
Auburn - 58/42
Tennessee - 57/43
LSU - 56/44
Kentucky - 52/48
Georgia - 52/48
MSU - 51/49
South Carolina - 48/52
Arkansas - 46/54
So, 10 out of 12 teams ran more than they threw it. Arkansas is the most surprising to me. I know Petrino likes to throw the ball, but when you have Michael Smith as your RB, and Casey Dick as your QB, I would think you'd run the ball more than you throw it.
If you go purely by run/pass ratio, it would appear that Croom's offense was a lot more "wide open" than Urban Meyer's offense. However, I think that you're seeing these days that the most unique offenses aren't the ones that pass the most, they're the ones that pass efficiently and run the ball creatively to keep teams off balance. Meyer's offense definitely did a good job being creative in the running game. Meanwhile, Croom threw the ball more but was much less creative in the running game.