We had dinner at both recently--Aug. 8 at California Grill and Aug. 15 at Narcoossee's.
I liked both. At CG, my appetizer was excellent, and my entree (fish), while good, was not spectacular. At Narcoossee's, my appetizer and desserts were good (not great) while my entree was excellent.
DH much preferred Narccoossee's. He said his food was better there. We both had the crabcake crusted halibut--and it was amazingly good.
My kids all liked CG better, hands down. My oldest DS, who is very adventurous with his food, did not like the scallops at Narcoossee's and declared that they were "terrible."
Service was comparable at both places.
Now actually, out of the 3 signature restaurants we tried, our favorite was Citricos.