Garland: 3.50 ERA, 115K, 26 longballs
Oswalt: 2.94 ERA, 184K, 18 longballs
This doesn't tell the full story, however. Even as his stats are better than Garland's, his stuff is much better, and, of course, he has the Astros home factor behind it.
The Astros are the favorites for Game 3, and if you don't see that, step back from the kool-aid. However, Podsednik recently hit a walkoff to CF off Brad Lidge. So, all bets are off. But I don't think we'll see two deviations from reality so close together.