Ran I hadn't thought of 7-8-9 and 16-17-18 being so similar but yes they do have the same pars and all play in the same direction.
From my three plays of the course (about 8 years ago), 9 and 18 definitely seemed the most similar certainly from a length perspective (they are each slight doglegs in the opposite direction).
8 is a fairly meaty three-shotter. 17 seems like it really should be listed as a par-4 (if that matters to anyone here). And as you noted, 8's green is large which I do recall quite clearly. Those two holes had more to contrast than compare IMO.
Being a longer (and often wronger) hitter, I felt compelled to try to drive it down near the green on #7 with mixed results. I remember hitting fairway woods off the tee on 16, leaving myself about 150 yards in. Again I felt there was more to contrast for these two holes than compare.
With the trees fully down now, it's no doubt easier to want to compare those holes as they run side-to-side and I'm sure the golfer now has a great view of each pair of holes twice per round. I always thought 6 and 7 seemed to be too similar though that's perhaps just from a length perspective and the fact that they are back-to-back. 7 is only uphill in the approach to the green while 6 plays uphill pretty much the whole way.
In any case, the restoration work just looks fantastic. Hopefully I can get back to my home state sometime and have an opportunity to play Moraine again. This formerly good course now looks incredible.