Honeywell and Vedanta both implement e-procurement systems but differ in their approaches. Honeywell uses the SAP ERP system which provides high security, reliability and organization but has a more complex and time-consuming process. In contrast, Vedanta uses a simpler file-sharing approach on a common network drive which has lower costs and complexity but also less security and organization. The appropriate system depends on factors like the business nature, resources, and ability to accept changes.