In fact, they are all the same, there is no difference between good and bad, they are the largest credit card organizations in the world, and their functions and services are the same. All have automatic foreign exchange purchase function, and there is no conversion fee for overseas transactions ~ so it's all the same to choose one, depending on personal preference! However, it seems that there are more people running VISA ~ After all, VISA ranks first in the credit card organization and MASTER ranks second ~