Im also guessing that, by the time you get an MQA file properly handled ie the ADC signature is compensated for, that an upsampled file vs a properly unfolded file with DAC correction is, for most people on most systems, going to sound pretty close.
I believe that all ADC compensation is carried out in the 2nd / 3rd stage Unfolds... And where necessary is specific to the ADC used... And the User's own DAC.
The 1st Stage Decode is a generic "unfold" up to 2x rates... With no ADC or DAC specific compensation.
And just to be clear... I don't believe that Auralic is doing ANY of the Three Stages of Decode / Unfold.