AES or MVS? How can I be certain?

Hi,
How can I be certain befor I buy a AES game that it is not MVS? What if the seller gives the mvs into the original AES box with the original manuel?

thx to all ya!!

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have you ever seen A neo home cart before. any way go take A look at shawnsneo collection page. click on A home cart game and then click on an mvs game and you will see the difference. mvs carts are wider than home carts. it is impossible to put them in A hom cart case because they will not fit.

have you ever seen A neo home cart before. any way go take A look at shawns neo geo collection page. click on A home cart game and then click on an mvs game and you will see the difference. mvs carts are wider than home carts. it is impossible to put them in A home cart case because they will not fit.