Mechanical vs Hydraulic cams

[Mrturner1]

So I know that roller cams make the most power because the opening and closing rates are much faster due to steep ramps, and they also rev higher and last longer and all that good stuff. But if a guy were to compare two flat tappet cams, one solid lifter and the other hydraulic lifter, with all other things being equal how much more would the solid make over the hydraulic? The ramp speeds of a mechanical aren't as fast as a roller, but they are faster than a hydraulic correct?