By all appearances, they're sitting down for the first time together and calling out the tunes as they go (note Julian mumbling ". . ballads, ballads. . ." while trying to jog his memory for an appropriate standard). Given that, it's pretty remarkable how fluid their interaction happens to be - the musical "conversation", each with their own distinct voice happening, is pretty great despite the relatively demanding material and spontaneous nature of it.
I just love the way Mike plays. He plays the most interesting lines. He's just different. Both players seem unaffected. By that I mean they don't seem to be overly influenced by great players like Pat Metheny or George Benson or Jim Hall or Pat Martino etc. They both seem to have dived in to learn the instrument on their own and in the process became their own players.