It totally wrote off Azure (2nd in market size) because its a "Linux second" cloud (what does that even mean in a virtualized world).
Also, you forgot to analyze support and SLAs around functionality. Good luck with GCP when something goes wrong or they decide to sunset a feature.
One of the reasons why Spotify went with Google Cloud is because of their superior support.
<<This should really be titled "A comparison of AWS and GCP.">>Even if not, they are such a large well known name that they probably got special treatment. The real proof in the pudding is the support that the 99% get, not the special case 1%.
"Overall it was a smooth transition and we're very glad that we picked GCP as our provider - we've received excellent support and scaled up our deployment with few incidents."