I haven't done an extensive study of the Duo, but the extra connectivity would have been nice had it been available on the EDGE. But I believe it's the same ABT solution so no advantage there. Features, a more conventional physical profile, and added connectivity may be the selling points versus the EDGE (to me, anyway).
And perhaps the Duo will work better with the Oppo 83 in Source Direct mode. Since there's no AR from the 83 in that setting, everything in SD 4:3 gets stretched. My Pioneer 09 doesn't have that issue, as its Source Direct apparently includes AR control.
VPI, Grado, SME, Pioneer Elite, Magnum Dynalab, Oppo, DVDO, McIntosh, JJ, Mirage, Kimber, Transparent, MIT, Pangea, Wireworld, Shunyata, PS Audio, Furman, Sanus