Supposedly the Yggdrasil also uses something no other DAC uses:
AD5791
It’s also not an audio d/a converter, but one (it said) used for things like missile guidance circuits.
Now it won’t have the good audio specs as say the last best PCM1704 R2R/multibit 24bit specific audio dac has, but if this matters, who knows?
Best to if your up to it compare the two with their data sheets.
Yggdrasils AD5791 http://www.analog.com/media/en/technical-documentation/data-sheets/AD5791.pdf
Burr Browns (TI): PCM1704: http://www.qlshifi.com/jszl/PCM1704.pdf
Cheers George