Hard to say since transitive properties don't apply but it would have been a different ballgame though.
Ohio State had a solid defense no doubt but even that 2007 LSU defense was better than that 2002 Buckeye defense. And no way in hell is that 2002 Ohio State defense as good as the 2001 Miami defense, and it's not even close. 2003 and 2004 USC defenses might have been just as good, if not better. 2003 LSU had a better defense even.
No, Texas and USC weren't giving up their spots unless they had a loss. Plus ESPN was going to do all they could to put both in the title game one way or another. It's a prime example of how college football is rigged in favor of big schools who draw the bigger ratings, (not who is actually the better on the field see last year with UCF).
2001 Miami (due to their defense alone) was probably the best team of the BCS era, the 1995 Nebraska team might be the best of all-time, though. I see no way that 2005 Texas team, even with VY beats that Miami defense and with the way USC was running up and down with Lendale, Miami with Clinton Portis wouldn't have been any different.