Comment 12 for bug 81681

Once this is implemented, it would also be very useful to display all strings from a module for which there is an upstream translation and it differs from the Ubuntu one.

I'm simply thinking of a new "Show" filter added to the existing ones ('all', 'untranslated', 'need review', 'translated'). Something along the lines of 'differs from upstream', which when selected would display only the strings different from upstream.