then I don't know what to tell you. Nothing I say will make sense to you, because you will not see that which is obvious. They may run the same base stuff (you're going to see zone read plays every week, and we're always going to run 3-4 up front on defense), but there are always tweaks. Nobody installs completely new offenses and defenses on a weekly basis, but everybody, including BYU, tries to figure out ways to exploit the other team's weaknesses and tendencies.