How come LSU is so much better than the University of Southern California?

USC is number one in the country, but from watching them play, they have nowhere near the talent that LSU has. Don't get me wrong, I"m an LSU fan, but seriously! LSU has a way better team than anyone in the NCAA. Glenn Dorsey is a mammoth on Defense, and NO ONE can stop them on offense. SO WHY IS USC STILL NUMBER 1?