Well its not just the knob. Look at it, it has more buttons and more functions concerning the moveability of the knob. Also the nav pro display is noticably bigger than navi business or radio pro (they somehow have to justify the extra money for the pro
). Ok.. the shifter.. but I guess that thing is just so cheap, they don't care. Also the shifter is an item where the customer is used to get customizability over decades.