North Vs South Korea - A short simple expilnation of the differences:
We can undoubtably say that the the two countries are not comparing like with like North Korea is a small, poverty stricken and a completely isolated country, South Korea on the other hand is wealthy and backed by America a very powerful country.
They never call themselves the names we do either, officially, it's the Democratic People's Republic of Korea (that's the North, to the rest of us) and the Republic of Korea. While the South is westernised and industrialised, the North has the distinction of being the most corrupt country in the world (joint with Afghanistan), according to statistics have a high infant mortality rate and homicide rate plus have one of the lowest press freedom than anywhere else in the world.