<prompt> Human: Hey all. Im heading to my bank to get a Debit card and I was wondering if there is any differences that I should be worried about between Mastercard and Visa?  <response>: There are very minor differences about the services each offer, but for the most part there isnt a real reason to prefer one over the other - from a purely transactional standpoint. They both are accepted pretty much everywhere cards are. Amex, discover, etc, may not have as widespread international use. 