There seems to be a bug with the "text only" option in the PDF comparison tool. When text is present within/above pictures or other graphical background elements, it seems to get disregarded.
Changes are found when "text only" is not activated. But this in practice increases "false positive" changes, thus bloating the comparison.
The text which is missed is most definately present as real text and can be copied without issues.
Attached are two comparison files with content I set up in word and exported to PDF (note that this also accurs with PDFs from InDesign). One comparsion was made with "text only" activated, leading to one change where there should be two. The other one without "text only", with 4 changes (but only 2 are of actual interest)
Can something like this be fixed in a future realease?
Comment review and collaborate PDF, General troubleshooting