Astroneer

haven't played Astroneer but its a finished game in full release.

Valheim is still unfinished and evolving. As it is currently at version .2 I'd say even the devs think it has a ways to go before 1.0.

What the game is today will likely not be what the game is when it finally hits 1.0. Right now every update introduces new bugs, backward compatability issues, plus complaints and flame wars about the changes made. Too much drama.

I recommend just putting Valheim on your wishlist and checking back every six to nine months or so and see how it's developing.

/my 2 cents