As a long time LMS/Squeezelite user, the first difference with MPD is the latter's bigger and wider sound stage. Of the two MPD I have tested, my preference is 0.21.4. I just find myself more engaged to music with 0.21.4. The vocals has a more "dreamy" feel to it, and the soundstage is wider and higher.
Anybody else done similar comparisons? What are your thoughts? Your feedback will directly improve future Snakeoil firmwares, so please share them if you can.