The W4 founders are the project founders and many of the top contributors to Godot Engine. Godot has always done what for me is the right thing for the continued open source nature of the project, including limiting any organisation's members on the leadership committee, assigning trademark rights to a foundation and not naming their company Godot Engine, LLC (unlike, say, Gitea).
So structurally it's the safest open source project against a future source available pivot, but there are some concerns such as the separation of the Godot foundation from it's parent organisation or a "de facto control" fork.
I think on the other hand, they do have a more clear selling point vs do it yourself on the open source projects. For IP reasons, console manufacturers don't permit the console integration part to be open source, so that's the bit that W4 has that the open source project can never compete with (though other companies building on the open source project could of course build their own).