Special Abomasnow, because with Snow Warning and Blizzard, it could be a sweeper, and Physical only has Ice Shard. And Avalanche which aren't as effective as Blizzard. You can teach HP on Special Abomasnow and not on Physical. And physical has the Recoil Wood Hammer. While Special has Energy Ball, with no recoil. So Special Abomasnow is better than Physical Abomasnow IMO..