Hetzner has four nines availability, usually higher. AWS claims five nines but chances are you'll mess up something on your end and end up at three to two nines, anyway. If you really need five nines you should probably colocate and only use the likes of AWS as a spike backup.

And I guess "messed something up on your end" happened in that case: I don't think Hetzner is necessarily in the habit of maximising availability of their homepage at all cost (as opposed to the hosting infrastructure), you probably caught them in a middle of pushing a new version.

...speaking of spike backups: That is what AWS is actually good for. Quickly spinning up stuff and shutting it down again before it eats all your money.