Loan normally refers to the fact that you borrow a lump-sum of money from a third party such as a bank. It is borrowed for general use of the business and not specifically related to any purchase of goods or services.
On the other hand, creditor is also a liability but normally aries out of the purchase of goods or services on credit, i.e., not cash payment.
Loan is normally borrowed for a longer term than credit which you are supposed to settle in a month, such as your credit card payment.