For that, you'll need to make a deeper analysis into the teams. Comparing the starting Big 3s of each side, you get:
Many announcers and analysts have mentioned it, and I will echo it - "If Rondo has a good night, then the Celtics will usually win!"
The additional unknown variables in the Celtics is how Delonte West and Glen Davis will perform in their roles. If they have explosive episodes off the bench, then the Celtics will surely cruise their way past the Heat. The rest of the Celtics line up are pretty much standard NBA players, with the exception of the injured Shaq O'Neal. When Shaq made the announcement the he was going to the Celtics at the end of last year, I just thought it was hype. I did not see what he could offer the team. He has had bursts of brilliance while playing for the Celtics, but it should also be noted that he has spent a large part of the 2010-2011 season sitting out of the game due to injury. I am happy to be pleasantly surprised if he comes out from injury and aids the Celtics to winning their 18th championship.
I, for one, am hoping that Celtics will sweep Miami. I may be too hopeful since Miami does have the home court advantage for this part of the playoffs, but I have optimism none the less.