The current version of Corona Benchmark features the Corona 1.3 rendering core.
The benchmark runs using Corona Renderer 1.3, which is an older version of Corona Renderer – updating the benchmark to a newer version of Corona Renderer would have no impact on the relative performance of 2 different CPUs and would only invalidate all the results gathered so far, so staying with the older version is actually useful from the point of view of a benchmark application. For using Corona Renderer as a render engine, naturally the newer (and faster) versions are better!
It’s easy to use: save, extract, and run the file. Benchmark starts to render the testing scene automatically and shows the result at the end, with an option to submit the result to this page. You can also copy it to the benchmark forum thread.