When I was relatively new to digital recording I thought there may have been a slight difference I was hearing between various audio software recorders.
I tested DP against Protools and Ableton Live on the same machine using the same preamps, mics, soundcard etc. etc. and subjectively thought that DP sounded a little <ahem> warmer, mebbe...louder and "fuller" on the mixdown.
I have since concluded that this was simply not true and was entirely subjective. More importantly, I also decided that this hoary old chestnut is just not worth giving any more thought to.
There are FAR more important factors to consider in the process of recording great sounding music like writing fantastic songs, performing them with every ounce of heart and soul you (or your artists) posess, and capturing that moment to the best of your ability with whatever standard of gear you own.
Nobody in the real world gives a flying f**k about which DAW sounds "better".
To use another (imperfect) analogy: if you were to order a steak in a good restaurant, what would concern you most - the quality and provenance of the beef, how skilfully it was prepared, seasoned and cooked by the chef? Or whether the skillet he used was made by LeCruset or Aga?