Originally Posted by Myth
It isn't a remake, it just has an alternate ending. The British one came out just slightly earlier and they didn't think American audiences would like this ending: http://www.youtube.com/watch?v=_jf_-vwIrsQ
(sound is slightly off, but you'll get the idea)
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.