This is a quote from the above blog that I wanted to expand upon. The big similarity that jumps out to me is how the "Peso" in that defense was really more of an undersized linebacker but you had still 2 high safeties over the top. In White's scheme that guy is the Rover and he's also more of a box type player than a Cover Safety.
One big thing to put into context that makes Pelini's defense very different from White's is he always wanted to be in a 2 high safety look. As we've seen in the NFL the past 2 seasons, that makes you more susceptible to the run which is why you saw some 2 gap principles in his fronts to "gain a man". As SSO points out, that works when you got the talent. White is going to "gain a man" by bringing more looks and more pressure.
One of the things you'll notice as a core principle in White's defense is how that Rover gives him tremendous flexibility in his pre-snap looks. He's often a 7th box defender, allowing the 2 cover safeties to play 2 high but he can just as easily be a single Free Safety allowing a man blitz.
