I recently played Shadow Ridge and PGA West Stadium. Striking differences in maintenance philosophy. Shadow Ridge overseeded the fairways and rough, so it was unbelievably green. Not very natural given the surrounding desert. PGA West overseeded the fairways but the rough was dormant Bermuda. In other words, brown. Totally different look.
My guess is that Shadow Ridge is new and wants to establish itself - thus it is maintained lush in the extreme to appeal to the occasional golfer who expects golf to be green. PGA West is already established and they can get away with charging $235 without undo regard to whether some people will recoil at something that looks decidedly unlush (if there is such a word).
The weather sure is nice in the desert. Kind of a waste not to play golf there.