One is a booming belltower of a personality. The other as quiet as a church mouse. One acts completely understated and professorial. The other is like a fraternity pledge. The contrasting styles of Ryan and Caldwell, however, run far deeper than what you see and hear. This game will be won with key decisions, Xs vs. Os and game-planning. Don't buy into the whole Week 16 angle regarding resting players, Colts folding, etc. That's what people are talking about, but not what will decide the outcome. The Super Bowl berth will hinge on how Caldwell prepares and adjusts his offense to Ryan's defense, and vice versa.