two alternatives for one song in a bookpart

Question

I am making a music book where each song is on its own page. The code for each song is:

title = ...
music = ...
\bookpart {
  \header {
    title = \title
  }
  \score {
    \music
    \layout { }
  }
}

I have a special case where I want to put two songs on one page, because they are actually the same song, only in two different melodies. It should look like this:

Maybe someone can help me achieve this output?

---

Here is the code I wrote for that special page:

title = "Es war eine Mutter"
\bookpart {
  \header {
    title = \title
    piece = "offical version"
  }
  
  % official version
  \score {
    \relative
    {
      \numericTimeSignature
      \time 3/4
      \repeat volta 2 { c'4 f f g a a f g g e f f }
    }  
    \addlyrics {
      Es war ei -- ne Mut -- ter, die hat -- te vier Kin -- der:
    }
    \addlyrics {
      Den Früh -- ling, den Som -- mer, den Herbst und den Win -- ter.
    }
    \layout { }
  }
  
  % Jane's version
  \score {
    \relative
    {
      \numericTimeSignature
      \time 3/4
      \repeat volta 2 { c'4 f f a g g a e e g f f }
    }  
    \addlyrics {
      Es war ei -- ne Mut -- ter, die hat -- te vier Kin -- der:
    }
    \addlyrics {
      Den Früh -- ling, den Som -- mer, den Herbst und den Win -- ter.
    }
  }
}

which gives this output:

This has two issues:

1. I don't want lyrics below the second version. But if I remove them, the notes will not align with the first version any more (they come closer together). But I want to keep the alignment.

2. I don't know how to set a different piece name for the second version. Since I am inside a \bookpart, I cannot use a \header block inside the second \score block to set a local piece name.

---

I also tried a different approach: Putting both melodies into the same score.

\bookpart {
  \header {
    title = \title
    piece = "official Version"
  }
  \score {
    <<
    % official version
    \new Staff 
    \relative
    {
      \numericTimeSignature
      \time 3/4
      \repeat volta 2 { c'4 f f g a a f g g e f f }
    }  
    \addlyrics {
      Es war ei -- ne Mut -- ter, die hat -- te vier Kin -- der:
    }
    \addlyrics {
      \override VerticalAxisGroup.nonstaff-unrelatedstaff-spacing.padding = #5
      Den Früh -- ling, den Som -- mer, den Herbst und den Win -- ter.
    }
    % Jane's version
    \new Staff 
    \relative
    {
      \numericTimeSignature
      \time 3/4
      \repeat volta 2 { c'4 f f a g g a e e g f f }
    }
    >>
    \layout { }
  }
}

This gave me the following output:

which again has issues, namely:

3. There's the connection bar (or whatever it is called) between both melodies. I don't want that, since it suggests to play both melodies simultaneously.
4. I don't know how to set a piece name for the second version at all, since it is just the same \score.

Answer 1

Different piece names for each score

\Score blocks can have their own \header block. Remove piece = from the outer header block, and add a header block at the beginning of each \score:

\header { piece = "Appropriate Title" }

---

Removing lyrics, but retaining note alignment

To remove the lyrics from the alternate melody, add

\layout { \hide LyricText }

at the end of the corresponding \Score block.