theoretically yes, but throughout the playoffs birdman was more efficient and the heat had a better +/- when he was on the floor...
the +/-, in the finals at least, has mostly to do with wade off the court. lbj without wade had absurd off and def ratings. bosh rarely plays without wade on the floor. switch bosh for bird and I would bet they get similar results.
wade was an offensive liability for them. even last night, he took some awful shots. to his credit he made them but they were the same shots that almost sunk them in game 6.
neither guy is getting moved, but if we want to play make believe, I would bet miami trades wade before bosh (focusing only on the basketball and taking nothing else into consideration)