Not really, They both give the bonus damage at 5:1.
For instance, my new agent, he has
139 Aim, it gives 27.7 bonus damage. 139/27.7 = 5.018
1623 Cunning, it gives 324.7 bonus damage. 1623/324.7 = 4.998
They are about the same. Do the math then tell me, if AIM is same as Cunning.