The AK JJ only comes in a 195. The AK JJ was designed to be a stiffer, longer radius "charging" version of the JJ, although it's still unstable at speed compared to a true charging stick like a 4frnt renegade or volkl katana. They lengthened the radius on the AK from around 14 in the 185 JJ to 18m in the AK, which is still on the shorter end of things. They also bumped the waist up to 120mm. The Magic J, however is 127mm in the waist. The flex is similar to a 192 bent chetler in the 190 size (that's the only one I've fondled personally), and I believe it will be coming in a 170 and 180 as well as the 190. The amount of rocker tip and tail is similar on the magic and the AK, the magic may have a slightly longer rocker profile, but not by much. The magic J is also targeted as a more dedicated BC version of the JJ which can handle itself at high speeds without as much hooking as the JJ. However, the radius is still 19m I believe, which is on the shorter end of things. What I would consider a true non-hooking, "charging" type radius would be up in the high 20 to 30+m radius range. The radius on both the Magic and the AK is similar to something like a bent chetler, which can haul ass, but not really in the same way that a renegade or katana can. Just food for thought. Both will be better at speed and in variable conditions than a standard 185 JJ, but neither will be a true charging stick.
-Isak