I've been through a number of DACs. Different chips, SS, R2R, tube buffers, etc. They all have their own sound. The bits might all be the "same", but how they get converted to digital is different and sounds different.
You may not be able to tell the difference. I would consider that a curse and a blessing. A curse, because either your ears or the rest of your system aren't up to the task of differentiating changes in sound quality. A blessing, because you won't need to spend more on a better DAC.