The website is junk. Airplane is only a foot narrower then the 300, with about the same range. I wonder if the drop isle is gone, along with the clamshell door.
I also wonder what the future is for the 605 now. With this near Lear being a close competitor to the 300 a 300XP model is probably in the works also as that airplane could easily be given more range. However, not much more can be done with the 605, and a 300XP model would make the 605 irrelevant. Maybe it's time for a Global 4000.