I'm from the Midwest and so for me...all of Southern California is keeping up with the Joneses. So it depends on your perspective.
La Costa: Is more spread out between neighbors. It has mostly families, retirees, and golfers. Cooler because of ocean breeze. Ave. $700's
Carmel Valley: Closer to San Deigo. Alot of Engineers and Doctors live there because it's closer to QualComm and Scripps Hospital. Ave. $8-900's.