Moral equivalence between the US, a liberal democratic Republic, and NK, a fascist tyranny run by a criminally-insane madman won't wash.

1) Dissenters in NK are punished by execution or torture and extended stays in concentration camps.
Non-violent dissent is a right in the US.

2) The US avoids violence when it can.  NK systematically uses violence against its own citizens and is currently threatening many countries around the world with annihilation because they have criticized NK.

3) The US basically observes international law.  NK regularly breaks international law, especially UN sanctions.

4) NK is based upon autarky. The US trades globally.

5) Military service is compulsory in NK and voluntary in the US.

6) NK leadership is based upon a divine cult of personality. US politicians are political pinatas.

7) NK believes that Koreans are the master race. The US severely punishes racists.

NK is an awful dictatorship run by a fascist, lunatic thug.

The US is flawed, but good.