I must say I was very surprised that the chap from gm told me that they wear for India and aus as nz the only thing what model would gm them selfs grade this as in the uk it would get down graded for the heartwood even tho it taps up better than some off my more expensive bats I am happy with it
Who is to know for sure mate, only GM really. Could be that he didn't want you to ask too many more questions about the subject so said that those bats are intended for the southern hempisphere market. Could be anything really. But i know for sure Nottingham makes and supplies bats to Aus/NZ/SA retailers. I also know as Number4 has confirmed that bats in those markets display the DXM and make in England stickers.
The Indian mades are strictly for the subcontinetal market, obviously people have their sources but still i don't think GM want to go down the route of people in the UK (or Aus/NZ/SA) buying the Indian ones, hence his story to throw you off the scent.
All guess work of course, and forums are here to dig a little deeper into the statements made by manufacturers.