Container images: mcr.microsoft.com vs GitHub DevContainers ghcr.io/devcontainers?

[rugk]

Background

I am trying to do add a DevContainer setup for a Python project. The VSCode extension/DevContainer itself recommended mcr.microsoft.com/devcontainers/python:2-3.14-trixie (yes this exact version), so I choose this, but somehow it has no git-lfs installed, but it s configured. (Anyway, different issue... opened devcontainers/templates#382 for it)

So looked at https://containers.dev/templates and found ghcr.io/devcontainers/templates/python:5.0.0.
Given this is also a new namespace/URL/source, what is up here?

Are he images on mcr.microsoft.com/devcontainers the same as on ghcr.io/devcontainers? if not, which should one choose?
It's confusing when not only the containers version changes, but everything?

Edit: To confuse even more, the Readme on https://github.com/devcontainers/templates/tree/main/src/python e.g. says it is:

Image: mcr.microsoft.com/devcontainers/python (source)

Or is it just based on this?

[rugk]

When looking at the code, it seems the GitHub-ones are also based on the Microsoft ones and are just further modified?

See #1691 for further tries. (off-topic though kinda, just here to cross-link)