Richt being better than Diaz doesn't mean that Richt was that good.
Remember the Banda/Patke combo Richt was promoting to co-DCs? With that combo, I'm not sure Richt even would have gone 9-4 last year, despite how bad the ACC was.
Like i said before, if you are putting coach diaz in the same sentence with coach richt, no need in talking football, says alot about what you dont know, carry-on!