NetBeans is faster at starting up and more stable than Eclipse. It uses Swing for its GUI rather than SWT, and has a custom plugin development format based on OSGI. The document discusses why the author chose NetBeans over Eclipse and IntelliJ for Java Swing development - its stability, customizability through plugins which he has developed, and open source nature. It also mentions his research into toolchain and assembler development using the NetBeans platform.