Don't know much about either Orbis or Durango CPUs - if they're just off the shelf AMD CPUs, or modified. Don't know how the 14+4 CUs in Orbis really come into play. Don't know much about the DMAs and Display Planes in Durango. Don't know about sound processing for either (the Durango is supposed to be special in this area). Don't know about HDMI In. Don't know about BC. Don't know about their OS and abilities.
The leaks so far have given a pretty decent idea around certain components, but not the picture for the entire systems. Plus, they're still just rumours at this point, albeit likely to come from official documentation.