> For something like Amazon Aurora its a different story. Aurora is API compatible with MySQL and Postgres but it is designed internally to work quite different

> For something like Amazon Aurora its a different story. Aurora is API compatible with MySQL and Postgres but it is designed internally to work quite differently, really designed for the cloud first. And the result is its up to 5x faster than the standard open source software and just better than the open source version in many ways. It's also noticably slower than plain PG in other cases.