All physics packages have two major parts: physics itself, and collision detection.
For Bullet:
- poor physics.
- good collision detection, including convex shapes and hulls.
For ODE:
- good physics
- poor collision detection via third-party OPCODE library.
There have been rumors for about one year that ODE is going to drop OPCODE and replace it with Bullet.
Maybe it would be best to give ODE developers some time and let them do the integration of ODE (physics) and Bullet (collision).
enn0x