I wouldn't say that you don't stand a chance, but I do like the other guy's team a bit better--it's tough to top his starting rotation, even with Schmidt out.
The offenses match up much better--if I had to pick, I guess I'd still give the other guy the slight edge. His outfield's just a little bit more consistent, and he has Hafner whom he can plug in off the bench.
Like I said, though, you still have a decent shot at it. Play the matchups carefully, and see what happens. You've worked hard all season, I presume, but a lot of it is out of your hands now.
Is there a moves/innings limit in your league? One way to compensate for the disparity between pitching staffs is to spot start like crazy and at least try to beat him in wins and K's.