NovaWhy visual comparison beats scrolling side by side
Manually comparing two versions of a document means holding both open and scrolling through looking for differences — reliable for a one-page document, unreliable for anything longer, since small changes (a single number, a moved paragraph, a changed date) are easy to miss when you're relying on memory and attention across dozens of pages.
Comparing each page as an image and highlighting exactly what changed removes the guesswork — differences are marked directly on the page rather than left for you to spot.
Reading the diff percentage
The percentage under each page is roughly how much of that page's visual area differs between the two files — a good relative sense of how much changed, not a description of what changed. A single moved paragraph can register a higher percentage than a tiny one-character edit, since the comparison is visual rather than word-by-word, so always check the highlighted image itself rather than judging by the number alone.
When page counts differ
If one file has more pages than the other — a page added or removed somewhere in a new version — only the pages that exist in both get compared directly, and the extra pages are called out separately rather than silently ignored. Worth checking those extra pages by eye, since an added or removed page is often the most significant change between two versions.