I like Artist Point better in every way. Narcoosees did nothing for me; I thought the food was overpriced and unexceptional, and the atmosphere sterile. By contrast, I find Artist Point gorgeous, the view gorgeous, and have had several fantastic meals there. My best meal so far at WDW was probably at Artist Point.
Food aside, part of this is my personal bias to the overall theme. Narcoosees "theme" (atmosphere/decor) inside the restaurant just isn't to my taste, though fireworks over the lagoon are good if you're there at the right time. However, I feel that way at the Grand Floridian in general. By contrast, the WL theme does appeal to me very much. Naturally others feel exactly the opposite.