Well, I got a Gala apple and a Fuji apple from the store and did an unblinded side-by-side taste test with the Cosmic Crisp, and I've had to revise my opinion. I think now that the Cosmic Crisp is just as sweet as either the Gala or the Fuji, has slightly more robust flavor than both, and is just a bit juicier. Whether or not it is worth its extra cost is another question. Keep in mind, these are the impressions of somewhat abused 71-year-old taste buds.
Gala (on the left) and Fuji.
Gala (on the left) and Fuji.
John