Both dramas are similar in theme and spy setting. The main lead in both dramas is initially unable to prove himself at the new workplace, but later, thanks to perseverance, his own abilities and the support of those around him, he reveals his potential.

In addition, both dramas are similar in the slowness with which the events unfold in the plot.

Both dramas are dark thrillers about serial murder investigations. In both dramas, the middle of the plot is a turning point for the main characters, who suddenly learn shocking details about their mental state and involvement in bloody acts.

Although the plot of these two dramas takes place at different times and even in different countries, however, I believe that Jeong Do Jeon and Gunshi Kanbei are very close in spirit. In both dramas, we see the rise of great strategists who overcome physical and moral challenges to become legendary people from historical books.

Both Kanbei and Jeong Do Jeon were advisers to future rulers. Thanks to their efforts, such great powers as Tokugawa Shogunate and Joseon were founded. Throughout the story, Kanbei and Jeong Do Jeon, influenced by the injustice of the world they live in, form their own philosophical beliefs.