I have been using Eclipse for years, and have gotten pretty comfortable with PDT. But there are a bunch of little things that irritate me about it, so I recently checked out NetBeans 6.5. Initially I was very excited, but NetBeans' inability to produce patches that can get pass the Drupal testbot is a deal-killer for me. Anyway, here are my notes:
Pros
* Working javascript browser (yay!)
* Right click to folder to find/search (went away in most recent PDT)
* SVN built in
* Simpler plugin manager.
* Better viewing of patch files
** You can directly view .patch files with syntax coloring.
*** Especially nice to review after export.
** Also, offers to open a set of diffs, one for every file changed by newly applied patch.
* Cute css style viewer
* Nice cvs highlighting on uncommitted changes.
* Opens and closes faster.
Cons
* Cannot rename cvs checkouts (serious problem)
** How to handle multiple pulls of head?
** How to handle multiple versions of same module?
* Doesn't show @docs on mouseover
* Built-in diff produces patches rejected by testbot!!!
** Failed: Failed to apply patch.
** Tried running through dos2unix, but no help.
Notes
* Versioning -> Export Diff Patch
* Control-Space still works
* Use Ctrl-B instead of f3 to jump to function declaration.