I wouldn’t be too sure about the training. One time the “G” man mentioned that some South Korean guards caught some NK infiltrators swimming under water to infiltrate the South.
They killed them with hand grenades and recovered their bodies. He said every one was powerfully built and looked like they could have handled about anyone.
They have special forces who are required to enter South Korea, make a kill, and return without getting caught in order to be qualified. Those guys are pretty good from what I heard.
The average NK army guy is wearing ill fitting boots and probably has 3 or 4 bullets for his 50 yr old rifle. But he’s willing to die for the cause.
I know for a fact the SK special forces are scary as can be. They wear a skull and cross bones patch on their black uniform and it fits.