Lyrics extend question

[Jacques Menu]

Hello folks,

In a MusicXML version of Amazing Grace I have, there is the syllable ‘Was’ on a first eighth, and then another eighth without lyrics beamed with the first one:

      <note default-x="123.78" default-y="-40.00">
        <pitch>
          <step>E</step>
          <alter>-1</alter>
          <octave>4</octave>
          </pitch>
        <duration>6</duration>
        <voice>1</voice>
        <type>eighth</type>
        <stem>up</stem>
        <beam number="1">begin</beam>
        <lyric number="1">
          <syllabic>single</syllabic>
          <text font-family="FreeSerif" font-size="11">Was</text>
          <extend/>
          </lyric>
        </note>
      <note default-x="170.19" default-y="-35.00">
        <pitch>
          <step>F</step>
          <octave>4</octave>
          </pitch>
        <duration>6</duration>
        <voice>1</voice>
        <type>eighth</type>
        <stem>up</stem>
        <beam number="1">end</beam>
        </note>

musicxml2ly and museScore produce an extender such as:

while Finale and Sibelius don’t:

Is one way ‘better’ than the other?

Thanks for your help!

JM