It's hard to do comparisons. Like with the lock-mesh, you'd have to be a regular Jme user to know about it. There was that other test a while back that insisted on bsp collision even though it's not being used that much anymore. Also, the engines fill different niches. I use Jpct because of it's size. If I were really intent on features I would think about Jme because it has a lot, but mostly I want an applet to boot up in reasonable amount of time and still provide a game that's entertaining. Now I'll be able to experiment with a hardware game after my current software game is finished. Which is the other thing I like about Jpct, it has a meaningful software engine that can keep the game really small.