It's slightly different, because AWS have AZs. Each region is composed of at least 3 AZs, each one being at least a datacenter, at a distance from one another,

It's slightly different, because AWS have AZs. Each region is composed of at least 3 AZs, each one being at least a datacenter, at a distance from one another, but the region is usable as a single entity. An OVH DC is separate, but can be next to other DCs in an area ( e.g. the Strasbourg DCs were all next to each other) which is OK because they don't sell any AZ or regional features.