Joe, to my ears these don't really sound the same. Either that, or I'm getting mixed up with all the MIDIs.
The 'Away with Rum' MIDI is the tune for the verses only. For me, it bears something of a resemblance to the verse tune for 'Cigarettes and Whisky and Wild, Wild Women'.
The 'North Atlantic Squadron' MIDI is the tune for both verse and chorus of that song, and is pretty much the same as the chorus for 'Away with Rum'.