I don't know but why PSU manufacturers are making special "Asian" version with inferior quality
The same reason why people buy Rs. 500/- power supply. People want cheap cheap cheap power supply little do people realize that you end up compromising in quality. You simply can't have everything and expect it to do a good job.
Same reason for that specific RM psu with 'gold' certification. Corsair George made a comment that corsair made that move and phase out TX because of the people. TX series is technically superior but non modular to keep the costs down. A reasonable compromise. But people wanted 'gold' certification and on top of it wanted modular. The components are of lower quality than TX series, but it didn't matter to them since they got gold certification and modular- something that would attract number of buyers. Its only real psu reviews and people who analyse things properly which usually gets posted in forums like overclock.net that people get to know. Other than that, its a business move.
To a large extent, I somewhat agree with corsairgeorge's comment. Even in our Indian forums people recommend power supplies because of the brand and RMA rep, however the rate of RMA which has tremendously increased is something which was conveniently overlooked because according to some, it didn't matter unless the service was bad. One forgets that aio wc units and psu's warranty only applies for those components, and are not responsible if it damages any other components in the system. Even in digit magazines, the VS series power supply is religiously recommended on multiple counts. As it is no1 has the equipments to test power supplies in India where companies conveniently can push those India/China specific psu because of the brand name. It becomes worse when a mainstream magazine recommends that without any reference to proper testing.