To me, HI seems more like a discussion between two friends. It works really well because of Brady's reporting background and interviewing skills. In Cortex, however, Myke has said that he started the podcast because he wanted to see how Grey worked. As such, the podcast is just kind of a continuous explanation by Grey, to Myke about the way he works and what he is doing to improve his productivity. Myke then explains what he is doing off of Grey's advice and Grey improves it.