Both have dumb kids/ young adults entering a place that is off limits for a reason. Pretty much no happy ending BUT even though the premise for both these films are pretty much the same, GHA is much better in terms of the scare factor.
Both are creepy ghost stories. Both are based on actual places that exist (Gonjiam Psychiatric Hospital and Taichung Tunghai University) and a form of live streaming is used on both. (Gonjiam is more full stream, whereas Bridge is more clips of streaming)
1)A group of people streaming a haunted place
2) cursed spirit there
3) live streaming to outside ppl for getting views
4) all dead no one makes out alive
They are both doing live streams in a haunted building. Disappearance has only one lead, but he's really interesting to watch. It also has a twist in it.