Valheim definitely, but then you asked in the Valheim forums.

I haven't played Sons, but did have some fun in the original Forest in VR. Despite the fun of running around and feeling like I'm actually camping (in a horror movie) I prefer Valheim.

Maybe the question to you is, do you prefer an open-ended experience with maps that change with each playthrough, or do you prefer a more curated experience? Sandbox or theme park?