The last name of the character Bill, who may be Sophie's father, is different in each version. In the stage version, Bill's last name is Austin. In the film version, his last name is Anderson.
One of ABBA's most memorable songs, "Fernando", was removed from the film version due its controversial subject--war. Instead, Donna, whom is Sophie's mother, can be heard humming some of the song as she enters the old goat house when the possible fathers hide upstairs.
The three songs--"One of Us," "Under Attack" and "Knowing Me, Knowing You" --were all removed from the film version for undisclosed reasons.
The song, "The Name of the Game," was filmed, but it was removed from the theatrical release and has since been added as an extra on the film's DVD.
The song, "Thank You for the Music," accompanies the stage version's narrative. In the film version, the song is instead included during the ending credits.
"When All is Said and Done" is not part of the stage version, but it is part of the film version.