teleconverter – Sigma 150-600mm + 1.4x TC

Am trying to get 1.4x extender for my Sigma 150-600 contemporary lens (canon Mount), would like to use it for wildlife / bird photography.

Camera am using: 5D Mark III (placed order for R5 – waiting on it :))

Does 1.4x TC works well on this lens?

If So which one should i get Canon 1.4x or Sigma 1.4x