Well, I bought the SMSL M400 thinking, ‘it costs more than the entire NODE, and is bigger that the NODE, so as a DAC only it must be better than the little DAC in the NODE.’ This is what my untrained ear noticed with the new DAC:
More bass - too much - I’ll turn down the subs
More detail
A wider difference in loudness between the quiet and loud passages
The little errors in music like swipes on a guitar are more noticeable.
Ending notes hang on longer as decay.
So, I like the new DACand will experiment to get the sound better for my taste and ears.