Since the pandemic, J.K. Rowling released Stephen Fry's version of the audio book for free. However, the Jim Dale version is 8 hours 18 minutes and Stephen Fry's version is 9 hours 33 minutes. I know some audio books are released as "reenactments" were voice actors play different characters, there's music generally, and they skip over certain descriptions of what the characters are doing in the text. I don't believe Stephen Fry's version is anything like that, so I'm having trouble figuring out why there's a time difference. If I choose to listen to Jim Dale's 8 hour reading instead of Stephen Fry's 9 hour reading, will I be missing several chapters of the book? Or did they just add extra stuff like interviews from Rowling and Stephen Fry?
I bought both to compare and I think commenters Valorum & Matthew Barclay are right. Stephen Fry's edition is only longer due to the extended preview of the second book. Fry's version reads full excerpts from the Chamber of Secrets while Dale's preview is more of a minute and a half trailer. Otherwise the books are almost the same length in terms of actual text: Dale's is 8 hours 17 minutes, while Fry's is 8 hours 24 minutes. The 7 minute difference is due to the fact that Fry talks slower. And the chapter by chapter break down is around the same as well with only slight differences to due Fry's slow delivery.