Please tell me this is not one of those posts about one heel being a mm shorter/longer/taller than the other.
My guess is the inside of the left heel is unevenly colored/finished. Potentially wrinkled.
The medallion is off center as well.
Could be the angle, but the front quarters(?) look very uneven - look at the distance between the brogueing and the soles.
Also the strange markings above the left heel.
I saw the medallion issue, but think that might be just be a result of the angle of his IPhone when taking the picture. The heel issue looked like a polish issue when I clicked on the picture. I went with uneven heels due to how he has the shoes placed for the picture. Survey says . . .
They are beautiful. I love my pair. It was a toss up between the Bourbon color or Walnut.