1. Cost difference: there is no card replacement fee for damaged cards. The reason is that the card change is due to the physical damage of the card, and the cardholder can't continue to use the original card. The bank will provide free card replacement service to ensure the normal use of cardholders. You have to pay a loss reporting fee for changing your card, probably around 50 yuan. Loss reporting and replacement card is a card security risk caused by cardholder's loss or theft. Banks have to charge a certain fee for a series of loss reporting and card replacement operations.

2. Card number difference: the card number of the new card is the same as that of the original card to keep the accounts consistent. This is to facilitate the cardholder to continue to use the original account information without changing the related services such as automatic deduction and bill payment. Loss reporting and card replacement means that the card number of the new card is different from that of the original card to ensure the security of the account. The purpose of changing the card is to prevent the cardholder's account information from being used maliciously. The bank will generate a new card number for the cardholder, so that the previous card number can no longer be used.