Here is a thread about the OSK Challenger. I thought about buying one and looked into them. Decided I didn't need one because I doubt it does anything much better than what I already have.
https://kitelife.com/forum/topic/7783-osk-challenger/?tab=comments#comment-73791
I looked into the Jinx and Level one Badass also. I emailed Paul Debakker about it since I believe he designed the Hydra, the Focus kites Jinx, the OSK Jinx, and the Level One Badass. Here are a few things he said about the kite:
The osk sails are all cnc lasercut, whereas the focus jinxes were hand cut. Andy should be able to achieve higher tolerances and consistency from batch to batch and within batches. He will have an updated bridle soon (ask him about it) and the kite flies exactly the same to me a my Focus ones. The Jynx is the more precise and slightly slower kite of the two, the Hydra is its more radical little brother.
The Jinx definitely likes precise inputs and will reward precise flying style. The Badass is more forgiving that way but ultimately will never look as "crisp" in the sky as the Jinx. Yes, materials are largely the same, same icarex pc31 in all three and different, but same quality, frame materials. Build quality of all 3 is pretty much the same.