what is the difference between apple pencil model MK0C2AM/A and MK0C2ZM/A and do both work on iPadPro 9.7

I am try to find out the difference, if any, of these two models of the pencils sold on various websites. Amazon sells one model, Best Buy sells another, and Apple Store does not even state what model they sell.

Apple Pencil for iPad Pro

Apple Pencil for iPad Pro

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