Why should I trust Google to compare GCP, AWS, Azure? If I really want to compare services, I would do it on my own, look for independent websites or pay an independent company to does it for me.
To be fair this is not a comparison, but rather showing equivalent products with no qualitative rating of the other companies’ product. Therefore I think this is a good Ressource albeit not a comparison.
In a lot of rows they claim "No equivalent" available. If a company tells me that there is no competitor equivalent for one of their products, I would say thank you and resesrch on my own.