Thanks for those answers.
I understand now that the old axle is not a c200 and is larger than the dana44 in the offroad.

The dana44 in the 05 offroad is larger than a jeep dana44? (which does not make as much sense to me since they are called the same thing)

and the new 05 c200 has a ring gear that is about 1" smaller than the dana44, and a shaft that is also smaller though I don't know by how much.

Assuming that my understanding of the above is correct???

What about accounting for matterial differences. They do claim that the steel they use for the frame is at least stronger than the old frame. Is the same true for the axles?

Have there been any studies done on how much force it takes to snap any of these axles?

I've got to say you guys have been helpful to this newbie.