PMBO is absolutely hideously horrid. Everything is wrong in my opinion. The first drop, every corner, even the one coming out of the station, every hill, every thing. It physically hurt me, more than any other coaster that I've ridden, and that's saying something, as I'm a big Arrow and Vekoma fan boy. It managed to hurt my ribs on the left side on the first run (at the very back) and on the second run (sat in the front car) I hurt my neck going up the first hill after the first drop, my ribs again and my leg somehow. My back and neck still hurt, ever 24 hours on. Shame really, I had high hopes for it. Like every one else says, there's a big anti climax after the first drop and hill.
Infusion was good to me however. A little bit of roughness, but nothing intolerable in any way. Then again, I was sat in the very front, and in the frontish middle the second time. I actually really enjoyed it, however the in line twists were a bit violent. So my vote goes to Infusion.