Who do you like better?

Joon-Suk is the guy with the longer face, and Dong Su is the babyfaced right?

I'd say Joon Suk seems more interesting because of his relationship with
the narrator. We see his character develop more throughout the story,
and he goes through different changes. His conversations with
the narrator, and the ending where he is walking
to his execution (I assume he's been given a death sentence) in the hallway was very emotional.

Dong Su feels more like the typical Scarface thug who kills people
and such. But Joon Suk seems more human because of his problems.

[deleted]

Dong Su

Liked Joon-suk better until he kills Dong-su just as he was going to the airport. Then I really hated Joon-suk, but he manages to redeem himself before the end.