Yeah Woody runs a one-gap scheme. That's the most important difference. Guys at the line are generally responsible for 1 gap, thus the LB have more designated run fits as well instead of needing to read and react. The nose is still the most important player, lining up in 0-technique (directly over center), but instead of 2-gap responsibility he still generally has 1, but his alignment doesn't tip the OL off for which gap he'll cover. Since the center has snap responsibilities as well, this maximizes the advantage the nose has. Really pivotal for them to get penetration if they are not double teamed. If they are, it's hard for the O to accomplish because they don't know which gap he'll go for.
Theoretically, a 2-gap scheme allows for better LB play since they don't have designated gap responsibility. However, 2-gap is harder to cover so you end up relying on the LB to read the play and quickly make up for missed assignments. Also, DL have a harder time penetrating with 2-gap responsibility.
Sometimes Woody uses players with 2-gap assignments. What's especially different is there's much more effort to find out what a player is good at and use that strength. We've been asking our players to do things we need them to for the system instead of adapting the system to them. A 1-gap defense is more adaptable.