Kanmei with his immense strength, would undoubtedly be leading a frontal charge with his men behind him, mowing down any opponents that lay his path. He also has (or had) the giant soldier cavalry, and those men should be far superior to the standard infantry and officers on the battlefield.
Ko Chou possesses better leadership skills and greater intellect. Considering that the only way Kanmei's army was defeated was by Moubu directly charging at Kanmei himself though (literally smashing through his giant cavalry during the middle of the Coalition Arc), I doubt conventional military strategies would work well against someone capable of swinging a solid ball on a chain the height of a man, disintegrating soldiers around him, and then hurling that massive weapon tens of meters to mow down even more troops in his path.
"Disintegrating" is a bit of an exaggeration here since I meant to say men's upper halves being blown off.
Even if Kanmei and his core group of men run into a trap where they are cornered and outnumbered, it's going to be extremely difficult to defeat him in a direct battle. Ko Chou definitely wouldn't be the person to cleave Kanmei in half directly either.