The document compares the refactoring capabilities of Eclipse and VisualWorks, highlighting their respective operations such as class and method manipulation. Both tools only modify the system source code and lack built-in metrics, but Eclipse can be extended with plugins for additional functionalities, while VisualWorks needs a GUI for user-friendly refactoring. Additionally, Eclipse supports static views with incremental builds, whereas VisualWorks supports dynamic views via smalltalk's dynamic compilation.