Could you also add a comparison with SciPy? People often say it's just fine for scientific computing.
That's just BLAS (so could be mkl, could be openBLAS, could be netlib, etc. just depends on the system and compilation choices) under the hood, you'd just see a small overhead from the python wrapping. Basically, everyone uses a BLAS or Eigen.
An Eigen comparison would be interesting.
