From a proliferation perspective, Pakistan would seem to be a greater threat than North Korea. There is strong evidence that Pakistan actually sold nuclear technology to North Korea (although it's unclear whether NK used that technology in their weapons program).

https://www.dw.com/en/pakistans-indirect-role-in-north-korea...

There is also evidence of Pakistan sharing nuclear weapons technology with Saudi Arabia.

https://www.bbc.com/news/world-middle-east-24823846