I have the Andy M. Stewart Collection songbook, which has both of the above-mentioned songs in it.
Queen of All Argyll is in the lovely key of C#m so chords used are C#m, B maj and penultimate bar of verse and chorus are G#m! It is in 2/2 time sig.

Ramblin' Rover us in C MAJOR, and 6/8 time, so no resemblance between the 2 tunes.

I think the book is hard to get now, but worth having if you like Andy's repertoire. Its ISBN no is 0-8256-9420-5