Looks good, congrats! It would be awesome if you could include links for testing speed and latency for each provider (when available).
In the meantime, you could ping their domain name to get a rough idea (if they don't use CloudFlare or block ICMP) and contact their sales team to see if they can hook you up with something more accurate.
- https://www.linode.com/speedtest - https://www.futurehosting.com/network-test-files/ - https://speed.hetzner.de/ - https://turnkeyinternet.net/speed-test/