At that time I was a devoted LilyPond user, so I replicated the score with LilyPond to see the difference. And now as I'm getting deeper and deeper into MuseScore I did the same with MuseScore.
So I have the same score engraved with all four applications - see the differences yourselves.
The Score and Sibelius output is directly from Jeffrey Grossman's site (thank you a lot!), so I don't know if there are any tweaks, nondefault spacings etc. set up. LilyPond engraving was done with LilyPond 2.12, MuseScore is version 1.2.
The Score output is quite good, I would say it is superior. The Sibelius problems are described on the original page.
The LilyPond output is good as well, the spacings are ok, though there are some minor problems:
- the most severe is 16th beam-accidental collision in measure 3
- the hairpin alignment (can be easily fixed though)
- the > hairpin start position in measure 3
- the ties in measure 3 (though I think that would need tweaking in all softwares)