And what do you want to say? Norths are more stupid than Souths? Or is all Kim's responability?
All your comparisions are well explainable when you have a look at the sanctions lists, you would wear gray as well if you couldn't import cloaths for example.
I don't like it, when people from the 1st world go after the 3rd, especially when their own government is at least for 50% responsible for the situation.
Here you find an overview of all sanction catalogs, details you find in the links, but there are severel hundred pages includig all aspects of of life: https://en.wikipedia.org/wiki/Sanctions_against_North_Korea

Sorry, I don't like to hate on steemit, but I needed to express my opinion. If possible try to include a bigger variety of aspects in your future analysis.