McCain's speech is underway with much more to come. I've already found a striking difference between his and Obama's though. McCain is talking about what he's done - his record. He's promising change based on that record. Obama's speech was just about making future promises. No discussion of what he's done (at least none that I remember).
This is the experience argument realized. McCain and Palin can both point squarely to thing they've done. All Obama seems to be able to do is point to promises in the future.