Credit card and credit line have many similarities. Both the credit options let you to make minimum payments and uphold a revolving balance, or make payment for the entire balance as per the due date each month. Irrespective of which one you select to get, it is always a upright practice to pay the complete outstanding and evade high interest rates.
One more common aspect is that both of these credit options are to have a pre-defined limit. In other words, you can only make purchases up to a fixed amount. Moreover, your purchase behaviour will be reported to the credit bureaus either you are using a credit card or line of credit. This is why it is imperative to always make timely payments irrespective of you using a credit card or credit line.