Well that it some annoying typing there 2FasT4YoU.
Boost on a supercharger depends on the pully size that is attatched to it. The smaller the pully the faster the turbine(s) spins, the more boost you get. The amount of boost a turbo can produce depends on its size, efficiency, design, etc. Of course the larger the turbo the more boost you can get out of it. So you can get what ever amount of boost you want from either choice.