Basically an overhang linebacker in a 3 down front scheme plays outside the defensive end with his hand in the ground and is more of an attacking player playing near the line of scrimmage rather than typical LB depth. For instance you could have a front 3 with Simmons, geffridge, and Jackson with someone like Smith, Biles, or Spence playing that overhang backer and Cryer in the middle with Snith or Biles. The secondary would be 2 safeties McDonald and Williams, 2 CB Phillips and Mascoe, and a nickel (star) Littleton. Schematically PK preferred organic pressure from his front 4 defensive linemen and did not blitz much either LB or secondary. Keeping the defense structurally sound and forcing teams to be precise and execute long drives. Which he did and taught very well. Muschamp is more aggressive with blitzes and moving d-linemen with stunts etc. This creates more havoc and pressure but leaves secondary defenders exposed if the pressure doesn’t get to the QB or the RB.