http://soft.rubypdf.com/software/diffpdf
Change log
1.5.0
Added Save As action and dialog for saving the differences to a PDF file.
1.3.0
Added support for -a, –appearance, -t, –text command line options to
set the initial comparison mode.
1.2.3
Added a mention of comparepdf in the About box.
for letting us know. I added it to the Outdated Apps thread.
"What about Love?" - "Overrated. Biochemically no different than eating large quantities of chocolate." - Al Pacino in The Devils Advocate
Got it.
Pdf solution and software provider