I would say Docker. There is no substantial benefit in running podman, while docker is a widely adopted tool (which means more tooling in the ecosystem, easier to find answers to questions etc.). The difference is not huge tbh, and some time ago the biggest advantage for podman was being able to run rootless, while docker was stuck with a root daemon. This is not the case anymore (docker can run rootless), so I would say unless you have some specific argument to use podman, stick with docker.