“True, but that is principally down to the reduced weight the geometry is identical“
Actually the chainstays are a lot longer on the big Levo. That plus the weight will make it more stable.
The effects of head angle and fork offset are complex, it’s not just the resulting trail figure that matters. But basically shorter trail (as a result of steeper head angles and/or longer offset) gives more neutral steering, so less prone to wandering at low speed but less stable at high speed. Longer trail causes the steering to turn in faster at low speed but want to stay straighter at high speed. At middling speeds the behaviour kind of crosses over.