Never understand the "all transports" sound the same commentary. The same transport may itself sound different depending upon which output connection has been optimized by the manufacturer. The SQ through the SimAudio 260DT in my 2nd system sounds even better using AES/EBU than SPDIF. After hearing the difference I reached out to SimAudio to ask if any of the outputs had been optimized and was told AES/EBU thereby confirming what i heard.
Also, I initially had the Cambridge CXC in that system and it comes up well short of the SimAudio 260DT's SQ SPDIF vs SPDIF.