In his real signature, he loops the top of his lower case o’s...yearbook ‘fake’ signature does not have the loops. Betting either the entire yearbook writing is fake or his name was switched in from someone else’s. Along with the “Roy” written differently in yearbook, the Y has no tall loop after it, possibly his middle initial of S, not a clear S but possibly how he does it; his real signature, the loop of the R is much bigger than the yearbook ‘fake’ signature..and as those on twitter comment at the link, all the other strange things, the 7’s written differently, bottom date and words definitely written by someone else. Even the first few lines are a different handwriting style than his signature.
But don’t tell Whorealdo any of this, he is convinced by the yearbook writing that Moore must hang...idiot.
We need several signatures from that time period as people’s signatures will vary over decades.