Morricone often does this; one part of the album lyrical and beautiful, the other harsh and dissonant. The 15-minute "La Citta" is a challenging affair!
Again, if this onslaught of Morricone is getting annoying, no worries. It will end. At least it's different scores, and not just the same cover over and over again like certain other posters. My copy has a black cover, btw, not white. But I couldn't find the black online, except Amazon - which annoyingly doesn't accept hotlinking.