Every team that got a new head coach this offseason will be markedly different than it was the season prior. Even teams that merely changed coordinators or position coaches will have a slightly adjusted feel.
But some will be affected more than others, and some even more than that. A team that promoted from within, for example, stands to retain some core concepts from one regime to another, while a team that made an outside hire might experience wholesale changes.
Looking even deeper, a team like USC brought in Steve Sarkisian from Washington, but they didn't change coaching trees.
Sarkisian coached under Pete Carroll with former Trojans coach Lane Kiffin, and even though the two handle business very differently, the root of their schemes are closely related, like two divergent languages from the same family.
The following are programs that will feel the biggest change in their transition from one staff to another—all of which happened to change head coaches, though that wasn't necessarily used as a requirement.
But will that change be for better...or for worse?