Well, from personal experience I can tell you that the only people who have the 1608 documentation own 1608s. They've asked us not to share it since the design is still in production. As far as the others if you send them my way I'd be happy to do a quick comparison for you.
Not looking for details but how different pan, aux and master 2 bus are compared Legacy consoles since API's propaganda tries to portray how 1608 uses same designs as Legacy/Vision?