The way it portrays the psychological aspect of the story. Since it's based on a true story, it delves deep into the characters' minds. The movie doesn't just show the spooky events happening to Deborah Logan, but also tries to explain the possible reasons behind them. This combination of a true - story base and in - depth psychological exploration makes it stand out.
Well, its unique take on the horror genre. Instead of relying on typical jump scares, it builds a slow - burning sense of dread. The fact that it's based on a true story also gives it a different feel compared to other horror movies. It makes you wonder about the real events that inspired it.