SW&D seems to be more focused on what looks 'fresh', whereas MC seems to be more focused on structure.
Bad analogy time:
MC is like the 12 bar blues. There is a ton of structure that restricts what a musician can do, but that structure tends to keep the band tight and things generally work out well (although some might call it boring).
SW&D is like modern jazz. There is a lot more room for creativity, and also a lot more risk of noise creeping in, however when done...