So I have to ask--why is there so much variance in the grading of large copper cents, such as the Draped Bust type? For example, here is one version of F-12 (under two light sources):

And yet another "F-12":
A rather noticeable difference that makes me question the grading skills (or honesty) of sellers.
Is it because the average person cannot recognize the correct grading that sellers fudge a bit?
Are buying certified coins the only reasonable approach?