Via toolbar in the 3D comparison section you can easily perform comparative operations:

Comparative operations

The following figures show the 3D depiction of the respective comparative operation.

Show difference 1-2

Show difference 2-1

Show symmetric difference

With click on the parts are opposed.

With click on Expert mode on the left side the settings area opens. On the Colors/Transparency tabbed page you can determine the colors for each part or depiction:

Set color and transparency