For what it's worth, I've tried all of these belts and found that for rough grinding any ceramic belt seems to work and last about the same. I use Norax exclusively from X100 (about 120 grit) to X16 (about 1200). Depending on the final finish I don't necessarily go to the highest grit.
The thing that I like about Norax compared to any other belt is that they can be "recharged." That is, you can use the sharp edge of a piece of steel to refresh the grit a couple of times before the belt is completely worn out. This makes them quite a bit cheaper to use. Also as someone mentioned, they're waterproof, which is nice when you're impatient and don't want to dry the blade every time you dip it; and a slightly wetted belt seems to cut just a bit better. But maybe that's my imagination. I haven't done any formal testing on this stuff, just my observations. The belts are flexible enough to make cleaning up a plunge line work well too, though the Trizact work fine for me in that regard.