"The Guest" centers on exorcism and supernatural elements, with characters dealing with demonic possessions and battling dark forces. The plot revolves around three main characters—a psychic, a priest, and a detective—working together to fight an evil spirit known as Sohn, which has left a trail of death and despair. "Judge from the Hell" also explores the supernatural realm, with characters confronting twisted souls and dealing with dark forces. While it focuses more on moral judgment from a supernatural judge figure, it still brings forth themes of vengeance, punishment, and the afterlife.

Both series revolve around the concepts of justice and retribution, especially in terms of punishing wrongdoers. In "Judge from the Hell," the plot implies a supernatural judge presiding over earthly wrongdoers, judging them for their sins. In "The Guest," the idea of justice is more rooted in combating evil and seeking revenge against dark forces, but the theme of justice through unconventional means is still central to the story.

Both series employ a dark, suspenseful tone that keeps the audience on edge. "The Guest" utilizes horror elements and psychological suspense, with frequent intense scenes involving exorcisms and violent confrontations with possessed individuals. "Judge from the Hell" also embraces a dark tone, focusing on the moral ambiguities of punishment and possibly psychological horror, given its judgment-themed supernatural setting.

" The Guest" addresses human sins indirectly through the impact of possession and the demonic influence on people’s darkest tendencies.
"Judge from the Hell" seems to take a direct approach by addressing human sins through a supernatural judge's verdicts, reflecting a similar focus on moral consequences.

Both main characters have been hurt in the past to the point they are focusing only on their work, till there is a situation where they are "forced" to meet new people.