How is it compared to nerdctl[0] (another docker compatible cli)?
Podman uses runc as the default container runtime. Nerdctl uses containerd. There are probably other differences but that's a substantial one imo.
This depends on the platform you're using. On Fedora and RHEL 9, the default runtime is crun. On RHEL 7 and RHEL 8, the default is runc. In any case they can be swapped as needed.