I think that does constitute one of the differences. They're drilling that where I don't know that most defenses do. But it's really a minor difference.
Another difference is that Nolan tries to spread out his linebacker blitzing among the two inside linebackers and one of the two inside linebackers a little more evenly. I think Pasqualoni would blitz more with Porter and Taylor, less with Ayodele and Crowder (can you blame him?), where Nolan would take a few of those blitzes off Porter's and Taylor's hands and toss them toward Akin Ayodele, who might have been replaced by Reggie Torbor in a Mike Nolan starting lineup.
This does not necessarily constitute more aggression overall. Miami had 4.36 players rushing the QB on average under Pasqualoni (4.29 in 2008 and 4.41 in 2009). If you take into account Mike Nolan's defense in San Francisco combined with his defense in Denver, he had had 4.33 players rushing the passer on average (4.22 in San Fran 2008, 4.44 in Denver 2009).
Was Nolan a tiny bit more aggressive in 2009 than Pasqualoni? Yes, by a miniscule amount. Nolan blitzed DBs every 5.6 plays in Denver, Pasqualoni in 2009 blitzed DBs every 6.4 plays. Denver had 4.44 players rushing the QB to Miami's 4.41. The differences in both are so miniscule as to barely be mentionable. And when you take 2008 into account, Pasqualoni was technically more aggressive than Nolan on a two-year basis.
We're not necessarily talking about more aggression to the QB, just a different kind of aggression. Mike Nolan will blitz the DBs just a little bit more (not much but a little). But I emphasize, the difference is not significant. The bigger difference is like I said where Pasqualoni would want guys like Taylor and Porter doing the heavy lifting from the outsides on the pass rush, Nolan will take one of his inside linebackers and make him almost as significant a blitzer as the strong side outside linebacker, who at the same time becomes a guy that drops back into coverage a lot more than Jason Taylor did.
I would say there's a little bit more movement in Nolan's defenses. Probably more fakes. More zone coverage from linebackers.