I think it's much harder to build a program from the ground up than to maintain it. Saban came in and changed the culture of the program. He was able to convince those in a position of authority to make a commitment in terms of facilities for example a new academic center. No disrespect to Miles but he hasn't built a program of LSU's caliber. He is however a good coach. I don't know why we get into these comparisons when it's obvious Saban is the best coach in the country. Saban is now in the conversation with some of the greatest college coaches of all time.
It's not. Every single coach agrees that it's harder to maintain and elite program than to build one. Saban and Meyer even said so in the post game of the BCSCG.
Also it's common sense. Which is harder to do? Have 2-3 great recruiting classes or have 7-8 great recruiting classes.
Is it harder to win 11 games for 2-3 years or won 10 Games for 8 years.
It's common knowledge that its harder to maintain a program.