What is the difference between the docker packages in the sl-extras repository and the ones from docker-ce-stable (as recommended by https://docs.docker.com/install/linux/docker-ce/centos/ ?   Recommendations for going one route or the other?

The version numbers don’t even seem to be from the same universe:

docker-ce.x86_64 18.06.0.ce-3.el7 @docker-ce-stable

docker.x86_64 2:1.13.1-68.gitdded712.sl7  @sl-extras

Boris