The benchmark tool is different. I mentioned the same on my benchmark page.
We had to write a small benchmark utility (membench) ourselves because the long-term metrics that we are optimizing need to be evaluated in a different way.
Also, the scripts, utilities, and infra configurations are mentioned. Feel free to run it.
These are the real numbers - https://dzone.com/articles/performance-and-scalability-analy...
Does not match with your benchmarks.