To me it looks better without fog, but the fog doesn’t look bad at all, I just like it slightly more without fog. Imo best would be if both states where in the game, if performance allows it. Sometimes (more) foggy, sometimes not, depending on time of day or in game events.

In the fog picture there is also some dark sky between trees (along the upper edge, about 40% from the left) that suddenly jumps out, I don’t think that patch should be that dark if the player is standing inside a cloud.