Controlling Crowds Pt IV doesn't grab you quite the same way that Parts I - III did, and for that reason, I more or less blew it off for a long time. Parts I-III have a much more immediate urgency and undertone of dread and hopelessness that just sucks me in every time.
But recently I've found myself drawn more and more towards the quiet and much more tranquil work done on Part IV. Parts I-III and a good deal of the first bit of Part IV take you through a very dark and nightmarish world. The 2nd half of Part IV seems to be about the rediscovery of hope after all that bleakness. Maybe it's just where I am in my life right now, but that message of hope after (or even amidst) darkness really resonates. Even though I'd have to say Controlling Crowds Parts I - III is my favorite of the two, I'm finding myself drawn back more and more towards the uplifting conclusion of these albums. In a way, the dark path the albums take to reach this uplifting conclusion makes it a lot more credible.