its a bitch to install
Superchargers are linear and finite. Turbochargers are more exponential and have greater capacity to provide power with less load on the engine.
1) Superchargers create boost from idle, but can't usually flow enough air to pull all the way to redline.... where as a turbo can spool as low as 2500 rpm, but a turbo sized proportionate to the engine will pull to redline and beyond 2) also theres parasitic drag on the motor with a supercharger (I.E. the belt and pulley) where a turbo is driven by spent exhaust gasses that would otherwise be shot out the tailpipe (free energy - no parasitic drag) 3) superchargers have a much lower maximum boost than a turbo ... and changing boost pressures is much simpler with a turbo (a twist of a boost controller vs. changing a pulley and a belt) im not knocking superchargers, there easy to install, and provide great power gains... where the plumbing to install a turbo kit can be hard for an amature to acomplish.....but both systems installed, the turbo setup is superior to a supercharged setup in many ways.....Joe