I'll add my 50cents: simply put, YES, manipulating is more powerful then going aggro - because it is so. Because it's versatile, because I don't need an actual gun, and so on. Yet it's sometimes much more dangerous, as without having something to back up my plans, I'm hanging in the wind.
I think this difference in power is linked both to the world of AW, and to the stats allowances.
See, I think it's very important thing to understand - that moves are linked to the stats in playbooks, as well as to setting, - and very much so.
Under Fire is a very powerful move, catch-all, if you want. Having high +cool is very nice. And it is hard to get. There's only one or two books which start with high cool - battlebabe, and quarantine. most of the others have to up it long and painful way. On the other hand +hard is pretty easy to come by in the playbooks. But it's a lot more limited. It's obvious and one-way - remember that basically author shows us that solving things with violence eventually is rewarded with same violence killin' you. Because this is the way of society - easy enough to get a gun and grow hard balls, much more difficult to have a decent brain.
And +hot is in fact not only a "face" stat, it's very much in the brain as well. con man beats stupid legbreaker most of the time. still, when he blows it, he is a toast.
So, to say it short, in the post-apocalyptic society manipulating is hard to master, but it pays very much so, - because it's a social play. And society is good.
Playing with a gun is much easier - that is why it's hard to use in social situations when killing the other side is not an option.
Important thing is, however, that this rule is not always works when we swap settings. There're ones where there're much less fighters, but much more charmers, and having +hot(equivalent) at high levels is easy. In this case basic move should change accordingly