No.
Did a fresh wireshark comparison. I am making a wild guess now - please have patience with me.
I compared tcp.stream by tcp.stream. The first question is when the Onkyo sends a #GetSearchCapabilities
MC15 returns <SearchCaps>upnp:class,upnp:artist,@refID</SearchCaps>
MC16 returns <SearchCaps>dc:title,dc:creator,upnp:artist,upnp:genre,upnp:album,dc:date,upnp:originalTrackNumber,upnp:class</SearchCaps>
The next question is when MC sends its first #GetVolume and get its answer from Onkyo then
MC15 asks GET /scpd/AVTransport_1 HTTP/1.1
and MC16 asks GET /scpd/RenderingControl_1 HTTP/1.1 and thereafter as MC15
Later on when MC says #Play, MC15 plays and MC16 fails with dlnaerrorcode 716 - resource not found as it have done so far every time.
Does that make sense ? Is SearchCaps invalid ? Is get /scpd/rendercontrol out of sequence ?