It goes without saying that these devices carry different radios tocaterto regional needs, with the Droid DNA and the J Butterfly both supporting CDMA and LTE on top of UMTS. However, only the Droid DNA comes with quad band UMTS radio, thus making it a better global phone.
But in the case of Nokia and IBM, being in the developing world made them realize there was a whole new market with a completely different set of needs that they could caterto, and make some money in the process.