Through the Model Explorer command line interface you can start the Differencer in its different contexts, and generate XML reports of differences.
Generating XML reports of differences directly through the command line interface is useful should you want to, for example, schedule a batch file that generates a difference report for a Model overnight.
Note that you can also perform Artisan Model Differencer operations through the Modeler Automation Interface. See the Modeler Automation Interface topics for the DiffModel and DiffPackage functions.