Source compare shows the differences between source files, directories, or projects. If you perform the diff command on directories, a comparison of the lists of non-versioned members is done. For projects, the lists of versioned member files are compared.
Version compare compares other attributes of the files, directories, and projects that are not considered to be the source; for example, the create_time, modify_time, name, and version.
The diff command supports the following subcommands: