@Yohimbay There was a topic on this forum fairly recently that provided a link which somebody had actually done an in depth analysis of both inputs.
It turned out that on average the only way that controller was actually superior was when it came to one clipping people. The rest of the stats studied favoured MnK.
There's this weird myth being propagated by anti crossplay protestors in which aim assist simply removes any effort required when aiming, which simply isn't true, recoil control is still required.
Before you say anything, yes I'm a console player, however I play with AA off and I'm willing to bet its much harder for me to control my spread than it is for you with a mouse.