I would not have been surprised if the sound was indistinguishable. DACs are a commodity product these days. At OEM quantities, the difference between a standard and 'high end' DAC is mere dollars.
It was not night and day, but it was like ... Damn..my entire music collection on disk drive, of which I have over 600GB worth of, does not sound as good as the latest CD that I ripped to disk when played on by Blue Ray player.
Mind you, back when I first got the Anthem, it's AKM dacs were far superior to my older Yamaha carousel cd player.
Things change so fast in electronics / computers etc.. it's crazy !