We had dinner at both in August, and we're dining at both when we're at WDW this Xmas.
DH liked Narcoossee's better. I found the food at Citricos to be more gourmet in presentation.
Citricos also has a much quieter and more elegant atmosphere.
We had attentive servers at both places.
I think if you want an upscale and refined meal, Citricos is the place to go. If you want a more casual and relaxed meal, then do Narcoossee's.