So, how does Nordic, Scandi or Siberian Animism differ from the Indo-European forms anyway?

Firstly, it's had more contact with Shamanism, leading from duality to triadic relationships.

Secondly, the personhood is darker, less related to daughter culture, due to the climate.

Thirdly, the management of the landscape has changed, meaning that these people have a different relationship to the environment when compared to hunter-gatherers, or a pastoral community.