Compare Versions ought to show the setting, just like everything else that has a Settings option does:
EDIT: the same goes for the Grammar section in the EG.
The Commentaries and Collections sections have a secondary title because it is possible to create a guide with multiples of these sections necessitating a secondary title to distinguish them from each other. Compare Versions can only be added once.
The only section that does not follow this pattern is the Grammars section. I have a created a case to examine this behavior.
The Commentaries and Collections sections have a secondary title because it is possible to create a guide with multiples of these sections necessitating a secondary title to distinguish them from each other.
That is one purpose of the secondary title. Another is to let us see with one glance what resource or collection we're using.
Compare Versions can only be added once.
Which immediately raises the question: why can it only be added once? If I'm looking at a verse in Genesis, I might very well want to Compare Versions for both the Hebrew Bible, the LXX, Swedish Bibles and English Bibles, and see those comparisons side by side.
If you fix the Grammar section, that will leave Compare Versions standing out even more: the only section with Settings that doesn't have a secondary title, and the only section with Settings that can't be added multiple times. Consistency please![;)]
And now I found yet another bug to report...[:(] (BUG 5.1 RC2: Compare Versions doesn't want to change versions)