Magic: The Gathering cards are printed in different places, every country has its own supplier.
There are several differences between cards printed in different places.

For example, cards printed in Japan are popular for their high quality in terms of the consistency of the paper, resolution of the text and less curvature for foil versions.

There are many confusing aspects that can mess up with players and sellers, this is due to different printing technologies and different types of paper. It’s important to know this aspect to be sure cards are authentic. 
And yes, they are doing everything possible to lead us to make mistakes.

This upcoming guide is made to help the global community to trust and collect MTG cards from different markets.