The ‘79 set was a ‘must have’ for me, having seen the group in their last UK week in 1980. Very nostalgic, as they played quite a number of the same tunes on the 2LP set (‘Theme from Mash’, ‘Laurie’, ‘If You Could See Me Now’, ‘Nardis’).
Both sets I think have been getting very good write ups - as you say, Jazzwise gives the earlier set the edge. I’ll give the ‘73 set a spin tonight.