There are literally hundreds of variables, but the TPC is a nonprofit organization dedicated to benchmarking performance/efficiency of data microsoft.com/en-us/server-cloud/products/s..postgresql.org/wiki/TPC-HThe hardware is a major factor, as is the type of schema (OLAP vs OLTP) types of joins, distributed/clustered etc.
But without anyone offering solid benchmarks, we don't know if that's true or not.
Heck, even with No SQL databases we don't have solid benchmarks.
People love to show off using commodity hardware, but I've never seen someone publically run a test using enterprise grade hardware.
SQL Server 2016 Developer edition differs from their other free offering, SQL Server Express, in two ways.
Unlike SQL Server Express, it cannot be used in production environments.
In conjunction with the release of SQL Server 2016, Microsoft has announced that the Developer Edition of SQL Server will be free.
In order to take advantage of this offer, you will need to be a member of Microsoft’s Visual Studio Dev Essentials program.
The Visual Studio Dev Essentials program, which is also free, is the channel through which Visual Studio Community and Visual Studio Code are offered.
Also included are various Azure products, Microsoft R Server, and free training from a variety of vendors.