Would you believe that both Apollo 17 signed mats are the same Autopen patterns? Look at the variation in the G in Gene, the R in Ron and the E in Evans! I suspect the Autopen arm was bouncing around due to the bumpy surface of the mats.
There can be a great deal of variation in the same Autopen templates due to the armature vibration, the item being pushed through too quickly, the template wearing out, etc. Often, some people will claim an item is NOT an Autopen because there is a tiny variance from a published pattern, even though the remaining 98% of the signature is a total match. Don’t believe them!
With practice and a sharp eye you can identify Autopens that vary from published patterns. If you are not sure, I can help!