Originally Posted by Legend of Josh
So you're saying same exact actors, scenes, etc. - just alternate ending for the British audience? Just finished watching the UK ending, and yeah, it's different. I think either one could have worked, but the UK's version puts the viewer into a much deeper state of psychological curiosity wondering just how everything would play itself out with both Sarah and Juno still down there.
Although there likely wouldn't have been a sequel, since the most common interpretation of the British version is that she went crazy and was killing everybody while just hallucinating the humanoid creatures.