The Debussy and 650D were very close performers, with a slight edge to the 650D, being it a tad more dynamic and more engaging.
Both were very detailed with no digital glare, at least to my ears. Bass performance was quite good on both. With hi-res material the 650D excelled with fantastic sound stage. The Debussy again was very close but with a presentation somehow more distant.
Need to consider the context though:
A full Simaudio system might have favored the 650D.
The 650D served as a transport to the Debussy during this audition. Speakers were the Raidhos 1.1.
That is why I would like to know other opinions about this comparison on systems other than full Siamaudio gear.
I am also considering the dCS reputation for firmware upgrades, including the already announced capability for DSD over USB (soon to be available on the Debussy).