Thanks for doing that! I have been looking at them and noticed that the Fs in both the yearbook and the ransom note are the same, with a straight top. Also, the Ts are the same in some places, with the bottom curving in. At the end of the ransom note, look at the word "sense." The Es are the same as the Es in the yearbook. The As are also similar between the two.
I think in the yearbook he's trying to write "fancy" at the beginning, but then his writing is more relaxed towards the end.
the "e"s? no way. look at the angle of the loop in the "e"s in the yearbook, how they slant upwards. the loops in the "e"s in the note are not angled upwards.
b, p, y and l all have similar pen strokes. R's are pretty different. I'll leave it to an expert though.