So we're back to the original question, and you didn't answer it. Why is the situation similar enough that this is a meaningful measuring stick?
What I would be comparing it to is the
concessions Iran made to stop their nuclear program and to verify that they actually did. Specifically, Iran agreed to:
o Reduce their number of centrifuges from over 20,000 to "no more than 5,060 of the oldest and least efficient centrifuges."
o Reduce their uranium stockpile by 98% to 300kg, with the stockpile enrichment limited to 3.67% (which is useless for atomic bombs, but not for reactors).
o Limit nuclear research and development to Natanz, which is constantly monitored by video and subject to random inspections.
o Allow international inspectors to inspect any suspicious site in their country within 24 days.
o Continued ban of ballistic missile technology for up to 8 years, and an arms embargo for up to 5 years from the start of the agreement.
Any agreement with North Korea would entail some similar kind of verification agreement that they won't do further work on nuclear devices. I am hard pressed to imagine a more robust agreement short of unconditional surrender.

In exchange, the Iranians were given back over $100 billion of their money that was held overseas, were allowed access to global financial systems for trade, and, of course, the ability to sell oil again, plus the lifting of some other sanctions, such as jet aircraft.
So these are the points of comparison that I am using. I'm sure you agree that these particular points are applicable to North Korea, too.
For instance, can you explain to me what we gained by breaking the Iranian deal?
The ability to cut them off from sources of income that touch American dollars. The ability to impose secondary sanctions that punish non-US companies that do business with Iran.
This is where I'm a bit unclear. Exactly what sanctions is Trump planning to unilaterally impose?
Because from what I can find out, the one major sanction that really hurt Iran was the one for oil. They have made billions in sales of oil since the lifting of sanctions, and it seems to be their major export.
But so far, I have been unable to find how much oil we buy from Iran. It seems that we don't buy any. I have only found sales mainly to Europe, Japan, China and India.
So without the cooperation of other countries, I don't see what major source of American dollars we will be cutting them off from.
And while we can impose sanctions on foreign companies that do business with Iran, that would further strain our relations with our allies, perhaps triggering another trade dispute.
So from what I can see, we are trying to remove the impediments on Iran to develop a nuclear bomb for the ability to impose minor sanctions on Iran and sanctions on our allies to try to force them to cooperate with us.
Hopefully the consequence of this flip won't be the same as of Obama's and lead to the rise of another Isis.
I very much doubt it. More likely it will be a war among Middle-Eastern nations, possibly a nuclear one.
