It depends how much interactivity you want. Like for my demos, I did mostly everything in Blender because the scene were static and already assembled. Then I just added the collision shapes in Godot. But this becomes a hassle if you have lots of interactive objects, want to spawn them with code, or do any kind of procedural generation. So doing it in Godot is more flexible. Also, Godot is easier to move stuff around, as you can type in or slide values, and the gizmos are easier to use. So it is probably going to be more fun to do it in Godot.
