Houken wins. He is the strongest character of the series. This man casually cuts giant trees like papers
kills tigers with bare hands
Moubu is unbelievable, but I cant see him single-handedly take on an army, beat the elite guards and kill the general. As Shouheikun said, it simply should not or can not happen. It contradicts the existense of an army itself. The stat sheets show how much respect Hara has for Houken's strength (over 100)
Regarding Moubu, he beat Kanmei, the man who called himself the strongest in China. Kanmei also claimed to beat Oukotsu, which kind of put him on the level of Qin's 6.
However, the king of Chu has no respect for Kanmei.
He was wondering whether he was stingy in his contribution and called Kanmei an imbecile. He was not talking about the size of the army as Kanmei's side had more soldiers than Moubu's. He meant he could have sent a stronger general than Kanmei.
The king clearly respects Renpa way more. This chapter tells me Kanmei is not on the same level of Kouen, Renpa or Ouki. I think Houken kills Kanmei much quicker than Moubu.