NFL

When guys are breaking down the plays, they know the result. They are telling you "This looks like Jimmy 2 Shift" after seeing what routes the receivers run, and what order the QB looks at each of the players in his progression.

The goal of the OC is to make the result not-obvious for the defense. So they'll do things like run multiple plays out of the same formation (e.g. by changing route combinations, the order the play is read by the QB, giving receivers options based on what the defense is doing, run out of passing formations or pass out of running formations, etc).

The difference between offenses and OCs are how they mix and match some of those concepts, which formations/personnel groupings they favor, and when they choose to call which plays (e.g. to establish or exploit expctations).