Volumio primo rca and coax connection

Have anyone tried to connect primo hifi edition to amplifier with both rca and coax at the same time
For possibility to switch between the output signals?

Is there any downgrade or interference in sound quality
And will one of the outputs be as default, do the primo remember the settings for each output etc.

B Regards.

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I’ve tried and both the RCA and coax outputs work at the same time. Great for comparing the DAC of the primo and the amplifier. I suspect the same applies to the optical output. In my case the DAC of the primo sounds better.
Because both work at the same time I think there’s no need for a default.