In case anybody cares, I emailed customer service at Sierra Snowboard, and they also confirmed that the Roxy Ally has a full wrap edge. I'm assuming their other top-of-the-line boards would too, like the more expensive Envi MTX, Eminence MTX, and Eminence BTX.
16 Gnu Swallow Tail Carver . 16 NS West . 15 NS Snowtrooper BIA
16 Burton Genesis X . 15 Now Drive
16 Flow Talon . 14 Flow Hylite