You could dig around the filesystem to see if there are any cached Deb files. It's possible being an internal device that some settings might be different and the original debs are not cleaned.
/home/user/MyDocs/.apt-archive-cache/
/var/cache/apt/archives

Then there's dpkg-repack, which may not create 100% exact debs.

Other than that, it might be worth generating a log of all installed packages and Maemo version information to see if there are any updated or different packages