I did some intense research before buying mine (due here tomorrow!) and from what I understand the Korean version was not produced for too long. It has a standby switch next to the 15/7 watt switch and I believe I read somewhere that with this version you need to put it into standby for a minute or so before switching between wattage modes.
I have not heard anything to indicate that the Korean version is any better than the China version. (China version clips to come soon, I promise).
It creates a moronic selling point if your selling it. "mine is the Korean version!"
Since when did Korea have higher quality standards then China?
It's a pretty basic design how could you screw it up?