The cast recording has much faster and in my mind, better tempos. All you would need to do is compare the overtures to get what I mean.
Barbra is 21 (almost 22) for the cast album and is spontaneous in a way that she is not 4 years later.
Trivia time: She was a couple hours late for the recording session. All the meager non-Barbra material had already been recorded. She did her Fanny-and-chorus songs, then her duets with Chaplin and then it was just Barbra and, you should pardon the expression, the boys in the band. They went on until dawn until she was satisfied with the takes.
The last song recorded was the mono version of "Cornet Man". (There had to be separate mono and stereo recordings in those days.) You will need to find a vinyl monaural copy of the album to hear this. Near the end of "Cornet Man" Barbra shouts out, "We're going home, boys!" This fits the style of the song and the recording. It was years before I found out what she was actually doing was telling the orchestra that this was a good take and the session will probably be over after the play-back. The shout-out is on the mono recording, but not on the stereo one nor the cd.
Title song info: the Oscar-nominated title song sung in the movie was written for the movie. However, there is another song written by Merrill and Styne called "Funny Girl" that was written and recorded by Barbra soon after the Broadway opening because Jule Styne thought every musical ought to have a title song. This song was never in an album, and if it was in the show it was only in very briefly. The recording got a little airplay on MOR stations (Remember 'middle-of-the-road'?) but not much. They were too busy playing People.
But I have the sheet music to Funny Girl#1 that I found in a 50 cent pile at Gimbels Dept Store in Phila in the early 70s.
"Absent Minded Me", the first song on her People album, was cut from the show out of town as was "Roller Skate Rag" (along with about 3-4 others). The latter was cut simply because the chorus could not do it and "Cornet Man" was put in the slot. The roller skates live on in the show and film logo however.
"If my life weren't funny, it would just be true. And that would be unacceptable."
--Carrie Fisher