If you watch pt1 and pt2 of this series, and take them at face value, you'd arguably be hard pushed to see a huge difference in them either?
https://www.youtube.com/watch?v=rqwboEpZe88
https://www.youtube.com/watch?v=EyDeT2tD97s
There's a digest and comments more eloquent than i can muster from the guardian: http://www.theguardian.com/tv-and-radio/2015/jan/26/bitter-l...
But yes, quite an eye opener and in place beautiful and haunting. If anyone has any similar pieces i'd be interested in them though Curtis himself seems to tackle some quite interesting topics: http://www.bbc.co.uk/blogs/adamcurtis