Well, in 1980 Pyongyang was one of the most efficient cities in SE Asia while according to US officials Seoul was a heaving mess of "sweatshops to make Dante or Engels faint", and in 1948 ~100,000 Koreans sympathetic to the North were rounded up and put in prisons (~30,000) or concentration camps (~70,000).
Links would help your case but seriously: You'd invest in 1980 Pyongyang rather than Seoul? You are a crazy person, even without the benefit of hindsight.
