The e-way bill is a separate document required for the movement of goods exceeding a certain value, as prescribed by the GST authorities. It is generated electronically and contains details such as the consignor, consignee, goods being transported, and the vehicle used. On the other hand, a GST bill, also known as a tax invoice, is a document that contains the details of a specific transaction, including the goods or services supplied, the amount of tax charged, and other relevant information. While both documents are related to GST compliance, they serve different purposes in the supply chain.