Both are excellent bullets. The Trophy Bonded Bear Claws are more expensive, but will outperform the Partition on the toughest of game. IMO the Partition will not outpenetrate the Bear Claw. The front section of the Partition is made to open rather quickly until it reaches the " partition" and expansion is stopped. The Bear Claw has a bonded core which keeps it from seperating. When encountering extreme conditions, the partition may only retain 50-70% of its weight. The Bear Claw will normally retain 90-95% of its weight. Weight retention increases penetration. I also think the Partition mushrooms at least as much as the Bear Claw if not more. If you look at the bullet selection most hunters in Africa(extreme conditions) use, not counting solids, a majority of them use the A-Frame, X-Bullet or the Bear Claw. For game that you will encounter in North America, I think the Partition would be a better choice because they are usually fairly accurate, open up quickly and penetrate very well.