A promissory note is a written agreement to pay or repay a debt. The promissory note is the evidence of the debt and the promise to repay it.
A loan agreement is an agreement between two parties where one party provides money to another party in return for future repayment with interest.
The difference between a loan agreement and promissory note is that, while both are agreements, they differ in terms of how they are structured. A loan agreement involves an exchange of money for goods or services, whereas a promissory note does not involve any kind of exchange.