User blog comment:B214/Volume 1 - 15 Discussion/@comment-174.52.115.52-20150422023344/@comment-23853100-20150422025422

First it's Cao Cao not Coa Coa.

Second, the thing it compared was Issei's dream as a hero vs Cao Cao's ambition as a hero. Issei dreams of becoming a hero for the Underworld Children and has stayed true to that ideals. Cao Cao on the other hand, while expressing his ambition to be the hero for humans went beyond human boundaries by taking in the Medusa's eye. Thus it became one who stayed true to his dreams, and one that didn't follow through his ambitions.

Thus Ise's dream was chosen over Cao Cao's ambition.