It does not matter what they claim, the only way to know exactly what you are running is by, getting on a Dyno, cars are different so the numbers are not always the same. But both those Tuners are excellant, and either way you go, it's going to be good. I believe the SCT, is a little more versitile though. I have both Tuners, SCT on my Stang and Diablosport on the wife's Camaro.
07 GT. SCT: CUSTOM TUNE by "MUSTANG SPECIALTIES". LMR: GEN2 2010 STYLE HEADLIGHTS, RAXIOM: 2010 SMOKED COYOTE TAIL LIGHTS, WHEELS: STAGGERED WHL 22X8.5F-22X10R.