They certainly are, but I think it's foolish to think that a regime change would play out the same in NK as it did in countries with very different cultures. I'm skeptical that NK's ideology would be able to sustain an insurgency after too much contact with the outside.

Also, the Viet Cong were supported by a state, North Vietnam. They also weren't able to defeat South Vietnam; that took a withdrawal of US support and the actions of the regular North Vietnamese Army.