I absolutley hate both of these coasters, yet, based on my last visits experience, I have to say Infusion. We went to PMBO first incase they were running one train (which they were) and it was by far the worst ride I have ever had on that coaster. It was appauling. Maybe because they're only running one train it's been wearing more, thus making it rougher? Probably not, because it would stll be going round the same amount of times wouldn't it, just the stations bare when it's going round as opposed to having another train filled?
Infusion actually rode pretty well. It is rough, but the extra padding makes it bareably. Some cool foot-choppers, but I'm not sticking up for a Vekoma SLC standard model. It does look much ncier than TraumaTIZER though, and rides a lot better I reckon.