Signatures of John Paterson

John of the 15th Regiment
May, 1799, Land Petition
1805, O'Hara Last will and testament
1811, Oath for Justice of the Peace
1812, School Petition (Justice of the Peace)
1812, School Petition (Junior)

It is thus far unproven whether any of the bottom five specimens here are the first John Paterson's signature, or if they might all be that of his son John...... or whether the last is in fact the signature of either. What do you think? all the same hand? or two?