I dearly love Pebble, but I prefer Riviera. There is so much more going on the greens and the course is more "balanced". There was more done with less at Riviera than at Pebble. The setting should not be discounted, but having said that, the design of Riviera is superior, IMHO. In other words, there's more architecture. As for the comparison of scary shots, while the ocean stretch is certainly tough, the approach at 2, the tee shot on 4, the approach on 10 if missed right, the tee shot on 13 and the 18th overall are very challenging in their own right. If you have never seen them in person, it's difficult to explain. Riv's collection of par 3's have the edge, but obviously PB has a couple of great ones. While 4 at PB is a underrated short 4, it has nothing to compare to Riv's 10th. While not as scenic, I'll stack 2, 3, 9, 13, 15 and 18 against PB's and I think it would be very close. PB has the edge on the par 5's. There are more "weak" holes at PB as well. I love them both very much, but I would rather play Riviera if I had to choose.