I thought the comparison is going to show some true differences but not a Marketing material. How does the Author quantify that Aurora is 5 times faster than RD

I thought the comparison is going to show some true differences but not a Marketing material. How does the Author quantify that Aurora is 5 times faster than RDS ? Maybe, the author adds some true comparison such as - Aurora recommends you to Decrease your number of transactions and rather do more volume in lesser number of transactions if you see this wait_event : IO_XactSync which is only observed in Aurora. This is because, Aurora waits on CPU to perform a Storage Persistence Check. And some more other differences such as Aurora and RDS does not let you created FDWs to any other databases other than Postgres itself. No Oracle_FDW etc.