Question:

Does the Comparison tool in Vault detect changes in annotations in a document?

Answer:

The comparison tool is limited to text changes between versions of a document. It does not detect changes in annotations, images, formatting, or any other structural changes within a document.

If text is not searchable in a document, the comparison tool does not detect it. Example: text that is within an image in the document.  

If Vault detects that there are more than 5000 changes in a document, it does not display any of the changes.

There is an option within Microsoft Word that provides a more in-depth comparison between documents. To use this, use the following article:  Compare and merge two versions of a document.

Related Documentation:

Vault Help Documentation: Comparing Documents

Thank you