Both involve curses of vengeful spirits, while one is Japanese and one is Korean they both have really good plots that will make you think twice about pissing off a ghost girl.
Female centred stories about friendship and rivalry in competitive industries. Overworking oneself for success, cheating to get into business are discussed in both movies. They have a dark and eerie tone, feature a couple of jump scares and illusions. Theres a mystery at its centre.