How can I compare the screenshot and material quality of my own model to that of the Google Model Viewer’s render fidelity tool?

For screenshot comparison and material quality checks, we use imagemagick. So, my concern is: Is it worthwhile to use the render fidelity tool in Google Model Viewer for the same purpose, or is imagemagick a better option?

Just use image magic…the results are better…but it is harder and not as user friendly as google is