Turbocharger vs. Supercharger. Which is better? It all depends on your driving style, or for me, the track and car.
Turbos work better with exotics. Turbos really help exotics get better acceleration, but mainly, better top end power. Superchargers really pack a punch, especially with muscle cars, but aren't made for top speed. They work well on the strip, or shorter tracks where acceleration is key. The bigger the supercharger, the more power it takes and gives. Twin-Screw pulleys have enormous output, sometimes too much. Centerfugials work well in lower rpm torque, and give off a more decent powerband.
I always use turbos on my exotics, and for top speed, like on Le Manns. They don't pack that large punch like a super, but spread it out much more evenly.