These models do not feature specially binned chips nor higher clockspeeds, as Gamers Nexus reports, Founder's Edition is basically just a fancy name for reference design. These cards use the new industrial reference cooler design with a metal shroud and NVIDIA will charge $100 more for this reference design than the typical cards sold by its add-in board partners.
It's NVIDIA's way of avoiding competing with its own partners, it enables the VGA vendors to undercut NVIDIA's pricing but also allows room for higher-end cards with a more expensive price card than NVIDIA's Founder's Edition.
Unfortunately, the Founder's Edition will be the first GeForce GTX 1080 to ship so if you want to be an early adopter you'll have no choice but to cough up the extra $100.