It depends on the structure too. Lawes is usually a wide forward in a 1-3-3-1 structure, and usually a hooke rtakes the other side for ease after lineouts.
Potentially Earl's dynamism lead to him taking precedence in a 3 man pod, but surprised by Curry who I think runs really nice lines at times. If they go more phases at a time in attack, you'll see more disparity in terms of who's carrying in the pod, but just going three phases likely means same people set up to attack each time off set piece etc