The PDF comparison tool would be more useful if their were additional optional settings to allow the user to specify if, for example, there have been additional pages inserted into the middle of a document which should be ignored when comparing the document to an older version with a smaller page count.

The PDF comparison tool currently doesn't cope well with this scenario (additional pages in the middle of a document) and the only workaround is to manually delete these pages before performing a comparison on the remainder of the document.