Hifiberry DAC+, better powered from RPi4 or from separate line?

Hi, I have a raspberry pi 4 with the hifiberry DAC+, powered from a battery with a 12V-5V stepdown converter.

The stepdown has a free 5V output which I could use to power the hifiberry DAC+ separately. 

Are these two options equivalent or one is better than the other?


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