Is there a difference in Audio Quality from the 3.5mm audio outputs w.in models?

[Ki Choi]

Hi,
Planning to use audio output to pipe streaming music through out the house using either the Dot, Echo, or Pro whichever has the best audio quality from its 3.5mm output.

Is there audio quality differences at their 3.5mm outputs between models?
Do all the models process the digital music for high quality sonic and use same audio opamp for same output quality?

Thanks,
Ki

[mike27oct]

All audio out is same and great.  I feed a stereo with a Dot.