Can't fully agree on that. From my experience nothing sounded more different than Burson Soloist and AURALiC Vega. Both are based on Sabre 9018.
In fact Chord DAC64 (FPGA design) sounded a lot closer to Vega than Vega to Burson.
Yulong DA8 (another 9018) also sounds quite different than the other two.
Check John Darko's comments on that "house sound" view.
The DAC chip "house sound" is a myth!
But nobody's listening!