There was a link posted a little while back to a discussion on another forum where the guy who designed the Voodoo line posted back-to-back comparisons with cam profiles from other manufacturers, in particular the Comp XE line. In numbers the gains were small (usually about 10 or so HP over the comparable cam); the torque band was also broader and flatter with the Voodoo's. It's not that much of a difference (the Comp's are still perfectly fine), it's just the Voodoo's have a slightly better profile over the other fast-ramp cams.