EarPods model numbers vary.

Apple EarPods (wired, 3.5mm headphone jack) seems to exist as one type, but it actually isn't.

For example, on Apple (US) homepage (->Accessories), they are selling MNHF2AM/A EarPods, while Walmart is selling MD827LL/A, and MNHF2ZM/A & MNHF2FE/A are being sold in other websites.

How different are they? I realize that MNHF2FE/A is being sold in the official Apple website in another country, and the official Apple US homepage is selling MNHF2AM/A, so I guess this might depend on location, such as where it is made, or where it is sold.

Any information?