both focus on the desire of highschool students and their complex emotions. i think if you like all of us are dead then nightmare high would be something you'd watch in one day

both are about students being stuck at their school and stranded. one focuses on a zombie attack whilst the other focuses on a parent getting revenge on students

both are about highschool students in a life or death situation. it forces young teenagers to go through traumatic events and explores their emotiosn/reactions