We've seen a similar style of scheme with Rod Marinelli, played more conservatively.
He liked his "rushmen" DLs, and Dan Quinn likes hair-on-fire speed rushers too. But the back seven is very different. Marinelli DBs couldn't catch a cold, Quinn DBs attack the ball like they're playing Hungry Hungry Hippos. You'll see multiple DBs try to lay out for the same ball.
The other differences is in personnel. Marinelli was pretty vanilla, in that he liked to use a traditional Will, a traditional Mike, and a nickel backfield. In Quinn's defense, all the underneath guys are basically safeties. He literally deployed a couple 4-safety formations on our second drive, and his LBs aren't that different. They're all 210, 220 lb guys, mostly playing man coverage, and they all run fast and hit. That's a job requirement. The back seven plays a lot more aggressive and high-energy defense than the BBDB.
Marinelli's defenses weren't as bad as they often got crap for, but they weren't THIS good. Last night's game was stunning. We are watching Dan Quinn's second Legion of Boom.