There is so much less variation in the NFL among all teams offensively and defensively than there is in college.

And now that Harbaugh is gone, who is running a unique system in the NFL on either side of the ball? Dom Capers is the only guy I can think of in the NFL who has any sort of truly impressive creativity.

In the Pac12 its conceivable that in a 4 week stretch one DC could have to game plan for Oregon, WSU, Stanford, and Arizona in a 3 week stretch. There is no comparable gamut of wildly different systems to prepare for in the NFL.