As far as I know (from what I've been told anyway), you don't get any of the fancy extras in the box - fan card / controller, pcie bracket for the M.2 port, no onboard wi-fi, 2 fewer USB 3.0's on the back panel (8 on the X99-s and 10 on the Deluxe) & only 1 GigE LAN....
Both boards look...