Yes The China's millitary was advanced only in terms of centrallized organization paid by the emperor, any able men can rise through the ranks to the General, and any noble man can't afford his own army.
In terms of armor, the Japanese used leather same as the Chinese.
swords - while samurai swords are well made, I don't think Japan are capable of providing a fine samurai swords for each of their soldier. So on average, every nations' swords are on the same level.
Raw martial art - I don't think it really matters, what counts is the physical fitness, Chinese average troops has no advantage on martial art over armies of any other culture, that's why the barbarians wins, they lose because they have no discipline.
Moral - China during that time was pretty corrupt so....
Navy - I don't think China has a navy during that war, as most of the naval victories were by the Koreans
In general, Ming army was of little impact on Imijin War. I recall some sources say the Ming army was more troublesome than the Japanese army, which I don't doubt.
Edited by Yue_Fei