Peas in a Pod

"As like as peas in a pod" is a familiar saying. These photos were taken to explore that topic: Are pea in a pod really alike?

Photo #1 below shows the pod before opening, photo #2 is the pod after splitting. Notice that the pea attachments are to alternate sides of the pod.

The other two photos show the 7 peas in a hexagonal arrangement. Snap A is one arrangement, snap B is another arrangement. Or is B really another arrangment? Can you tell whether the central pea has been changed? Perhaps the 7 peas were shifted around, but the central pea in snap A is still the central pea in snap B? What are the chances?

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Pea Pod Before Opening