Well, the only thing that you need is to execute the tests on the three of the providers, and compare them yourself if you want. Those are the keys of the project so far, reproducibility, independency and transparency.

I'm inclined to expand the review, but only if I find a way to get free credits from providers or another way to finance the tests. But right now, the best thing I can offer you is the same tools that I used here in the repository itself.