One feature of ExamDiff Pro that you may not be aware of is the ability to compare clipboard contents.

Comparing two clipboard fragments is easy with this feature. Open the Compare dialog, select the first clipboard fragment in whatever program you are using and click the first Select current Clipboard contents button , then select the second clipboard fragment and click the second Select current Clipboard contents button:

Note that you can also compare clipboard contents against files this way.

Two text fragments can also be compared simply by pasting clipboard contents into empty comparison panes after clicking Cancel in the Compare dialog.

For more information, read the tutorial on comparing clipboard contents.