e.g. no changes to production APIs without notice, no radical product changes (as seen with NL based vservers at DO) and much more.
If you're looking for something in the US, you probably want to go with DO but for Europe only OVH can beat Hetzner (only sometimes). Both offer 1Gbit/s uplinks and direct connection to the largest and most important CIX in Europe (http://de-cix.net/)
Hetzner and OVH are no startups burning money anymore. They make huge profits and are in business for over a decade. They know how to build, operate and scale things efficiently. They will not be gone in a couple of years. They are not as fast in providing "new stuff" (think of OpenStack IaaS/a Cloud Platform like AWs) but I bet this will change, too.
http://www.dangrossman.info/2012/09/24/who-hosts-the-y-combi...
California <-> Germany : 200ms
California <-> Canada : 80ms
What's the problem?If you need decent response-time everywhere in the world, you go and buy Co-Location. http://www.hetzner.de/en/hosting/produktmatrix/racks