Two new skis will be replacing the old Halos and Alphas. The is replaced by the new Alpha X and the Halo by the Halo 2. Both the Alpha X and the Halo 2 are wider than their older version. Apart from that from what I can gather without having skied either ski yet, that seems to be the only changes for the Halo 2. The Alpha X as well as getting wider underfoot (95mm @182) they have a more toned down shape to the Alphas of 'yesteryear'.