The difference between 1:3.24-1 (from Debian) and 1:3.24-1ubuntu1 is a cherry-picked patch to allow better compatibility with glib 2.76 and above (which at the time was in Ubuntu but not yet in Debian, since Debian was frozen).
The 1:3.25-1 version from Debian also contains this patch, so the delta is no longer necessary and you can just sync again.
The difference between 1:3.24-1 (from Debian) and 1:3.24-1ubuntu1 is a cherry-picked patch to allow better compatibility with glib 2.76 and above (which at the time was in Ubuntu but not yet in Debian, since Debian was frozen).
The 1:3.25-1 version from Debian also contains this patch, so the delta is no longer necessary and you can just sync again.
Updated the tags to reflect that too.