diffChangeLog with two offline databases

I have two manually created changelog files. The first, from.xml that represents the previous state of the database, and to.xml that represents the current state.
Now, from these two I want to create a migration (changelog), but all i get is a file with no changes.

–changeLogFile=“out.xml”
–url=“offline:xml?changeLogFile=from.xml”
–username=“postgres”
–password=“*****”"
–headless=“true”
–referenceUrl=“offline:xml?changeLogFile=to.xml”
diffChangeLog