Wow, that's super fascinating. They're totally right that there's a different feel to each, even if they're the exact same. The individual notes make them feel detached from each other, while paired give it a connection The four feel like they'd show up in the middle of a melody and the paired in the middle of a bunch of other paired notes. Also the drummer constantly going to town, and ripping on the sax solo bring me back to the old school band days.