The Colway tyres website mentioned above clarifies it all.
Basically there are four different types in the 4x4 range under the heading C-Trax MT (Mud Terrain), AT (All Terrain), what was called Formula C-Trax and now seems to be called C-Trax Sport, which is their diamond pattern off road competition tyre (similar to products from Bronco, Max Sport, Black Star etc.) and a new road biased tyre.
I have some competition experience of both the MT and C-Trax sport and have heard only positive stuff about people who compete on ATs. I rate them as good tyres.
Regards
H