Eclipse is like Emacs, Netbeans is like Vi
Care to elaborate?
Ok,
Eclipse: big, tons of plugins/extensions, everyone uses it
Netbeans: smaller, faster, not as many plugins, not used as much. Not used as much is rather subjective as a comparison point to Vi, which has had a large fan base for years if not decades. So has Emacs
See also: EclipseIde, NetBeans, EmacsEditor, ViEditor, EmacsAndVi.