It's hard to know how demographics compare with a secretive country like North Korea, but given the scale of population difference I'd wager that for every age

It's hard to know how demographics compare with a secretive country like North Korea, but given the scale of population difference I'd wager that for every age band they have more people, and the munitions and provisions to supply them. NK could conscript its civilians, but with such low morale caused by hunger I'm not sure they would win a war of attrition. It doesn't even seem evident that NK are interested in engaging in a 'hot' war, nor could that even be in their interests.