similar yes, identical...not so much. for starters there are far more reservoir caps in the power supply, the wimas and oscons are probably not fake, the relays on the spdif and USB switching are actually there. you guys are incredible tho, one picture of a design using similar parts on a red PCB and youve all jumped to the conclusion its the same thing, the number of dacs around using this chipset is actually pretty massive (especially in asia and on ebay I must admit) I have to say i'm a bit puzzled about the use of the risers though, if designing something from scratch, unless he plans an upgrade path for the PCB I see them as doing more harm than anything, especially for a high speed circuit. its possible this combination and layout is very close to the datasheet for the chips, considering they are all from the same manufacturer, that would explain the similarities, and 'God is in the detail' so to speak. the filtering and output I/U is different and as decware says in the literature this is where most of the work is done, tho it would seem most of the work was done in filtering, because buf634 and another fet opamp isnt what I would call ground breaking..
there is no denying they are similar and if I were him I sure wouldnt have chosen a red PCB for that reason as ebay is full of them at the moment.
but none of this is any reason to start slandering the man