Joe,
One could argue which property is more ideal between Shinnecock and NGLA. However, that is distinctly not the case between Sand Hills and Kapalua with Sand Hills enjoying a gigantic advantage. Coore was stuck working with broad slopes at Kapalua and had to work around certain off-limit features (like the canyon between 5 and 6) while at Sand Hills, everything was a go - he "just" had to find the best combination(s).
The broad slopes, tradewinds, and grain make Kapalua a unique playing experience and some holes like 13, 17 and 18 are as memorable as any in golf.
The holes at Sand Hills, though equally big in scale, have more subtle features as the property enjoyed more consistent variety/smaller features (i.e. like the hump that dominates the 7th green complex) as opposed to broad slope of playing up and down the hillside at Kapalua. For that reason, Sand Hills kills Kapalua in a hole for hole competition something like 4 up because there is more going on within each hole.
Both were designed for the wind and for fast/firm conditions. Kapalua was in showcase shape in 2000 when Tiger and Els battled it out (!) but the course has played significantly slower the past two years
and some of the magic of the design is thus hidden.
Seeing a ball land well shy of the 7th or 18th green and take what seems like forever to roll to the back hole locations is the highlight of my year in terms of watching the PGA Tour. Alas, Kapalua isn't enjoying enough roll at the moment, both before and on the greens - remember seeing some players get with a foot or two of the 15th green in two a couple of years ago only to end up with a nasty, awkward 50 yard pitch back? I haven't seen that yet this year, which seems a shame.
Still, with firm/fast conditions, the fun to be cumulatively had from the two designs is unmatched in the past sixty years by any other architect firm. Overall, one can hardly imagine two more diverse pieces of property and to have the chance to play/study them is to appreciate the range of talent found within the firm of C&C.
Cheers,