Apologies for another post. I had issues uploading within the other thread (could be user error but for some reason it was saying disabled in the upload area). Thanks for everyone's input!
Some elements of the George appear alright to me but I am not familiar with Petty at all. From what I saw of Petty signatures, there are many that are irregular.
The Dylan in your photos is definitely not genuine. It sure does look like the same ink as George's signature. The area in which it was cut is strange too.