I have several 9s and I've never even examined them very closely for stuff like that. As ocn said, absolutely nothing hand ground is ever "perfect". You give me any knife that's hand ground and I can find differences between the pile side and the mark side.
Something coming from a low volume facility will be closer to identical comparing symmetry and large volume companies have a looser tolerance, if for no other reason than they have more folks grinding away. Almost every knife ground by the same person will be very close twins to others that he/she grind. As examples, Terrio Knives has one person grinding every knife. Every knife he grinds will be very close to identical due to muscle memory, experience and attention to detail. But there will still be differences. T.M. Hunt has 2 people grinding, himself and Murph. More variation between individual knives as you have twice as many grinders. Expand that to someone like Kabar or Ontario where there are many more grinders, even more variation.
I bet if I pull out the old ruler and went to measuring, I could find differences, not just on my 9s, but every Becker, Kabar, Western, etc. that I have. My attitude on every "new to me" Becker/Kabar user has been, "Let's see, I ordered a 'Brand X/Model Y'. That's a 'Brand X/Model Y'. Mark that one off the list as received." And commenced to using it. Haven't broken one yet.
