Both shows have the same screenwriter and the same heavy feeling to them; both shows are fairly simple on the surface but a layered mystery lies underneath. Both dramas play with your mind and show you exactly what you want to see. Both shows feature an underprivileged/poor lead - Yan Liang and Yue Pu in The Bad Kids and Chen Youxi in Homesick
Both shows are based on deception - screenwriters show us what we want to see, allowing us to wrongly judge characters based on one perspective and incomplete data. While The Bad Kids focuses mostly on death, The Gutter focuses on life, uncovering mysteries behind people and understanding how bias can affect relationships.
They have very different plots but both have unique plot-twisters that will keep you on the edge of your seat and deal with dark themes/suspense/thrill. Horizon Tower has more mystery while Bad Kids has a unreliable narrator that requires the viewers to read-between-the-scenes to find the real truth.