These above two are different songs, though both with the same message, sung from the man's point of view. The best performance I know of "Sorry" is, without a doubt, Mike Waterson's, and Maddy & (? I think) Gay Woods also did it on (???) Hark The Village Wait. The tune is played instrumentally as a trad slip jig in Ireland, called "Ellen Grady" in O'Neill's but something else by the musos here - a girl's name (Caitlín Hayes or similar, in Irish). Sorry to be so abysmally vague!

The best version I ever heard of "When I Was A Young Man" is by Mike's bro-in-law Martin Carthy, duetting with John Kirkpatrick on the LP Albion Sunrise. Magnificent stuff.

These songs have two very different melodies & rhythms, as well as words. One is in a major key (flat seventh) in 9/8; the other in a minor key with a 4/4/ feel.   Both are brilliant IMNSHO.