The AS lounges are the only ones that beat the NW lounges, IMO.

Better quality food selections (good bagles/muffins/scones in SEA, for example), assorted fresh fruit, yogurt, carrots/celery/dip in the afternoons, and higher end snacks (chips, etc.). They also have flavored syrups for coffee.

The only weakness they have is the drinks -- they have only free beer, wine and vodka drinks. Though they do have a sparkling wine selection and Alaskan Amber beer.