[Zubersoft]

You can export the setlist to .mss (long press the setlist, tap Share->Export song list or Share->Share song list) and then transfer the file to the other tablet (you can do this over bluetooth if you want to avoid needing an internet connection). When that .mss file is imported on the other tablet, it will build the same setlist but it will only use existing songs on the device (no song information other than the title and filename is transferred with the .mss file). So if the changes you are describing are just which songs are included and in which order, this approach will work just fine.

Mike