Ubuntu on Windows 10: Docker vs WSL

I understand that it is currently possible to run Ubuntu on Windows 10 in two different ways:

1. Using the Windows Subsystem for Linux (WSL).
2. Installing docker for Windows 10, and use a container with Ubuntu.

However, I could not find an easy to understand explanation of what are the differences between them (talking about applications), as well as advantages and disadvantages.

I found a post talking about using docker on WSL: Ubuntu via (Windows Linux Subsystem) and Docker.But I'm talking about using it directly on Windows 10. So I will appreciate any information about these two.