Have narrowed it down to 2 settings. They are pretty similar. One has the band flush with the base of the crown, the other has the band ending higher than the base of the crown.
I prefer the first as the head is more integrated into the band. Some people want their diamond to sit high, if that is your preference you might prefer the second one.
I prefer the first setting simply because it seems more practical (in terms of the the diamond height). It looks like the diamond sits up too high in the second setting.
Not sure what difference people are seeing in height. The head appears the same on both rings, with just the height of the ring coming up to meet the head a bit higher on the first. I like the contours of the first one. Looks more flowing than just a simple ring with a head bang on top. Should be a bit more structurally sound, and also less leading edge to jag on things.