I personally like the Norax much better. The Gators are good belts, as long as you use then in a full surface contact situation. If your grinding where the full surface area of the belt is in contact with whatever your grinding. If you try to grind something like a spine or other thin area, the grit will "strip" off creating a worn down line on the belt....then when you try to grind something "full contact" it produces a raised line on the work piece. To a much lesser degree the same thing will happen with the Norax belts, but it's not nearly as pronounced.
The other thing that gives Norax belts my vote is the finish. My guess is it's a combination of the grit and backing, but for whatever reason a Norax belt leaves a finish that seems finer than the same grit size in other belts.
If I had to split hairs, I would say I favor the Gator belts in 120 grit an heavier, and I favor the Norax in 220 and finer.