Interesting that people loved it without seeing the stage show because I'm not sure what I would have thought.
Keeping in mind lack of reliable memory - especially as I was beyond terrified for most of the stage show!....
Main difference for me is case study 1. In the film, we are told immediately that Tony has stopped visiting his daughter. In the stage show, we aren't....it was a dept store warehouse I think, so the mannequins are there from the very start....and we keep watching them, start to think they're a red herring and maybe something awful will happen to the other security guard....and then suddenly a child mannequin raises her arms to her daddy.....
Case Study 2, yes I think the parents were added for drama! Also on stage, I thought he'd hit a person and thought the person would appear in the back of the car, so I was surprised when a demon appeared. In the film, it's like a demon threw himself at the car in the first place.
Case Study 3 - I kept watching the water feature thinking the poltergeist would jump out of there! On stage I kept watching the crib for fear of whatever horror might be shown....glad they kept the line "daddy's got meow meow" but is it funny now? It feels like a dated joke that might be lost unless you knew about it then?
And on stage, when the poltergeist finally appeared from the curtains, I nearly died of fright. Probably not worth trying to recreate that on film? Just as well really as I probably wouldn't have coped!
Oh and when the chap was peeling his face off, I didn't think he'd be Martin Freeman, I thought he'd be the charlatan from the start of the film.
Astonishing brilliant multi layered storytelling. My friend liked it but preferred the stage show. She wasn't scared at the stage show though either. She's tough. 