IMO the South course (1 play) presents quite a bit more interest in the architecture department. More options, more nuance, more to learn, more interesting greens (!!), etc. It is a really cool course and it hits many of my personal preferences.
With that said, AB (7-8 plays) is a very enjoyable golf course with SPECTACULAR views. It's a tough walk and rounds take forever, but you can't separate yourself from your surroundings on a late summer evening, on a 300 ft bluff over looking the sun setting into Lake Michigan - and you get that view from MANY holes. (I know, I know: GCA.com blasphemy.)
If both courses were located in a Walmart parking lot, I would probably go 9-1 or 8-2 in favor of the South. But they're not. So I would probably go 6-4 in favor of the South.