My observations, which are likely repeats of other's....
1. The diary is missing a
lot of pages between the two shown as seen by the page remnants in the spine, and as implied by a seemingly few number of pages between the cover and left page as well as the cover and right page.
2. The penmanship is different between the two. Obviously, the left page is printed and the right is cursive.
3. In the left page image one can see four colored pens beneath the book, including one that appears to be pink and may be the one used to write in this book.
4. The diary certainly is not a school yearbook as can be seen by the cover, but it was photographed on top of the 2001 yearbook (last image).