1: Culture. Strong's culture by even player's admissions was no focus (Alignment)
2: Strength: Herman's focus on strength and conditioning has much better results than Strong. Also, this has resulted in Texas being way more physical
3: He added many positions to the staff to get us out of the pre-historic era. This investment will pay out, just have to be patient.
4: He knows exactly what he wants. Strong just backed into hiring Sterlin. He had no strategy on offense for heaven's sake. He ran 3 offenses in 3 years.
I will probably think of more later, but, I am tired of typing.