The ezee will have at least double the torque because of the internal gearing. Check out http://www.ebikes.ca/simulator/
and plug in a few numbers. It doesn't contain bionx there, but the ezee easily has more torque than any other hub on the simulator.
The pros for the bionx include the automatic assist based on pedal effort (no throttle necessary), lockable battery case, included connectors, etc.
Negatives include proprietary battery (more expensive), less power probably.