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.