Things possible in IntelliJ that aren't possible in Eclipse?

Answer 1

One of the good points in my opinion is the Dependency Structure Matrix: http://www.jetbrains.com/idea/features/dependency_analysis.html#link0

There's a good introduction to DSM usage and benefits in Lattix' website (a standalone product): http://www.lattix.com/files/dl/slides/s.php?directory=4tour