In order to avoid changing those tests and possibly impacting results without warning, the baseline sets are being kept in separate directories.
This directory is for baselines version 2. These files are the current in-development set of baselines, and may change in minor ways, or have additional workloads added, for example. If you are performing baselines over a period of time and need the workloads to be perfectly stable, it is best to copy these to your test assets under a distinct name and call them from there.
To further disambiguate the workloads, each one has a version '2' appended to the filename.