the only difference is the interest-free period in the middle.
if the 14th of each month is the billing date, the 2nd of each month is the repayment date.
if you swipe your card on the 1th, the bill will come out on the 14th, and you must repay it before the 2nd of next month at the latest.
then there are about 18 days in this period called interest-free period.
if you spend money by credit card after 14th, the bill will be issued on 14th of next month, and the repayment date can be before 2nd of next month at the latest. The longest interest-free period is about 47 days.