Comparing Geometry in Creo View > To Open a Comparison
  
To Open a Comparison
In the primary navigation panel, click Geometry Compare, and then select an action:
Double-click the comparison.
Drag the comparison into the graphics area.
Right-click the comparison and choose Open in New View from the shortcut menu.
Right-click the comparison and choose Switch to View from the shortcut menu, and then select a comparison name from the list that opens.