No modern 46 resembles a traditional 46. The morphing of the defense is essentially a 4-3 that looks a little like a 3-4 with the safety up near the line (sometimes).
Schematically, one DT plays NT, the other DT plays 3 technique. The weakside DE plays wide and the strong side DE either plays wide or 5 technique. The MLB shades to the strong side, with the WLB more like a 3-4 ILB. The strongside LB either plays wide or shades low inside the strongside DE.
The Bills had Dareus as the NT and Williams as the 3-technique, though they sometimes swaps responsibilities. Hughes was the wide DE. Mario Williams was the strong side DE. Brandon Spikes was the MLB and Preston Brown was the WLB who shades inside. Bradham was the SLB, who was built more like a 3-4 OLB. Brown was built more like a 3-4 ILB. And Searcy was the SS in the box.
Schwartz did run a lot of wide nine on more obvious passing downs, but the morphed 46 was a part of his base D.
Yeah I don't have any recollection of that. Wide 9 is his thing, he's synonymous with it. He ran it as schematic his base, still does. Mario and Hughes both played traditional outside the OT DE. Neither lined up in the 5-tech slot like you see in 46 defenses. I also don't think they used their LBs anything like a 46 defenses, with the OLB up on the LOS and outside the SDE. Preston Brown was the everydown, Spikes was the base-only run-stuff LB that came off the field in nickel. Maybe when he first took over the defense there were some elements of that, because there was personnel remaining from Pettine's time where he did run a 46, but that's never been Schwart'z forte. There's articles and interviews with him from when he got hired about transforming the defense from a 46 back to a traditional 4-3.
The evolution of the Bills defense was completely maddening, much of it brought on by Marrone himself changing coordinators back and forth with different schemes.
-2006-2009: Perry Fewell runs a 4-3 under Jauron
-2010-2011: George Edwards switches it to a 3-4 under Gailey
-2012: Gailey fired Edwards, hires Wannstedt, runs a 4-3, Gailey fired
-2013: Pettine runs a 3-4/46 hybrid under Marrone
-2014: Schwartz runs a wide 9 4-3 under Marrone
-2015: Rex Ryan fires Schwartz, brings back the 3-4/46 hybrid Pettine ran, despite Schwartz pioneering a top defense, defense sucks
Aside from inability to find a QB, the personnel pendulum our defense ran for a decade+ was a huge contributor to the drought. Every few years we were starting over with needing new personnel.