The interesting thing about this one of McCain is that most of the typing is evident as an impression made through multiple copies. Some of it looks like it was done directly on the copy, not on the top layer.
Interesting!
I noticed that too.
The font looks the same, but the depth of the impressions looks different.
To my eyes it looks like the softer letters are in areas where the basket weave pattern is also less focused. The document is pretty wrinkled and beat up, that could be due to it not being flat on the scanner bed.
You'd think he'd have taken better care of the original...