I disagree, they are different, and that (containerization, not container here) is the more novel/interesting one imo. It'd be nice to focus the discussion more (though at present there are many confused comments there that think they're discussing the container tool).
On the contrary, it was helpful. Normally "containerization framework" and "container runtime" announced on the same day by the same company would obviously be the same story—but this was a rare exception and I'm glad you pointed it out!
Yes, container is like `docker` CLI: 'I am a developer and I want to run a container'; containerization is for packaging OCI image container sidecars into Swift .apps - you could distribute your app with postgres 'built in' (but running as a container), user doesn't need to ensure it's installed and running separately or anything.