there’s quite a bit that is different- slant, numbers, letters- all cursive EXCEPT the bottom line-
one possible explanation could be that she wrote ‘moore DA after he left- to remember who it was- but she didn’t indicate that she had done that- but definitely the two sections are different handwriting
I was going to go all Little Green Footballs and point out that the "Olde Hickory House" was printed, while the rest of the note was in cursive, but you beat me to it.
Also, why would Roy Moore sign "Olde Hickory House" at all? Is it customary when signing a yearbook for someone that you include the location that you were in when you signed it?