-@code{balloonText}; the former takes the name of the grob to adorn,
-while the latter may be used as an articulation on a note. The other
-arguments are the offset and the text of the label.
+@code{balloonText}; The former is used like \once \override to
+attach text to any grob, and the latter is used like \tweak,
+typically within chords, to attach text to an individual note.