[Podman] Re: buildah bud vs podman build

Hi all, I'm doing my first steps with podman and friends - so, bear with me. I was expecting the same results between buildah bud vs podman build while creating an image with a Containerfile. I noticed that the podman's artifact has a layer more then buildah's one: podman: "Data": {  "LowerDir": "...1ef8/diff",  "UpperDir": "...2a81/diff",  "WorkDir":  "...2a81/work" } buildah: "Data": {   "UpperDir": "...b9918/diff",   "WorkDir":  "...b9918/work" } Podmans additional layer has the outcome of: RUN adduser --no-create-home --home-dir /app --shell /bin/bash -u 1000 user separated while buildah has merged it into the "base". Is this the normal behavior or which knob should I use for a consistency output?