Macbook air 13" item number

Is there a difference between 13" macbook air with model number MC504LL/A and MC504ZP/A?
My friend and i got it on the same day but noticed the model number is different.
Can someone advise?
Thanks

Model numbers after the 504 may just be country codes for the components such as keyboards. I see that you are not in the United States so that your keyboard may not be the same as mine.

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