I think that's just country-wise differentiation. I can imagine that one thing that is different in those versions is the wireless channels available. Since radio signals are govt. regulated, You can't have a wireless device that transmits on channel 13 in say, the US. Cos in US, there can only be channels 1-11. In India, it's 1-13. So the difference isn't much, but it becomes necessary to launch them as different devices.