so...Georgia has 40 sacks on the season and Michigan has 34.
5 of Georgia's sacks however are from Adam Anderson, a kid that is no longer on Georgia's team because of criminal charges. So, for purposes of this comparison, let's say Georgia has 35 sacks to Michigan's 34, as all the players who have accumulated Michigan's 34 sacks are still on the team and actually playing.
30.5 of Michigan's 34 sacks have come from their Defensive Line. Roughly 90%. Michigan's book-end DE's Hutchinson (14 sacks) & Ojabo (11 sacks) alone combine for 25 of those sacks. Michigan has the highest pressure rate when rushing 4 in the country according to the PFF. They don't blitz much, because no one can handle the combination of Hutchinson & Ojabo. This is a massive advantage for their defense when facing opposing passing games.
14.5 of Georgia's 35 sacks have come from their Defensive Line. Roughly 41%. Georgia does not have a single DL or player in double digit sacks. Their leading sack artist is their MLB Nakobe Dean with 5. Their #2 leading sack artist is another ILB, Channing Tindall with 4.5 sacks.
These numbers seem to suggest to me what my eyes were telling me from that Alabama game, their pressure/sack rate is heavily dependent on blitzing their LB's and DB's. They don't consistently get pressure with 4. If you can scheme up to handle the blitzes you can gain big chunks on them. Bama QB, OL, and RB did fantastic job stone-walling their blitzes and torching them on the back-end. More I look into them, more they remind me of a "Dr. Blitz" Don Brown style defense.