The nFORCE, as John said, is going to be a brighter light. Hands down, no comparison.
Where mPOWER wins is in it's compact size. That's not to say the output is horrible on them, it's rather good considering the size.
The squads that we build get a mixture of the two depending on where the light heads are mounted on the vehicle.
The only slight advantage the mPOWER light has as far as programmability, is going to be using the configIT module. But honestly there's probably not much you want to do that you can't just use the preset tables for.
Also depending on what you are doing, you could do a poor man's blueprint. Order the data mPOWERs and a replacement BOB.