Both use virtualization systems, but They can be unique. Virtual machines have visitor OS, whereas the docker container shares host OS. This will make Docker containers far more efficient and light-weighted than VMs. As an example, you may validate that containers are deployed with enough resources through the host System. https://containers95431.get-blogging.com/27231401/the-smart-trick-of-containers-for-sale-that-nobody-is-discussing