Although I understand the defination which says:
- Burndown Chart: Use a Burndown Chart to track the total work remaining, and to project the likelihood of achieving the sprint goal. By tracking the remaining work throughout the iteration,
- Sprint Report: Understand the work completed or pushed back to the backlog in each sprint. This helps you determine if your team is overcommitting or if there is excessive scope creep.
But if you see the graph, more or less they represent the same.