In addition to looking at the cash back plans and annual fees, you should always keep in mind that most of the cash back credit cards have welcome offer promotions, which you can earn extra cash back once you have spent designated amount within a certain period of time. You are suggested to choose your credit cards according to your personal spending preference.
Also, cash back credit cards for overseas spending may charge a foreign currency handling fee, which lowers the cash back rate, so we suggest that you should check if these fees apply before applying for the credit cards.