[texan]

autofan- The biggest advantage all supercharger systems have over the turbo concept is simplicity. The drive system for the compressor is just much more complex on turbos than a simple crank driven pulley, which is why turbo systems have more parts than s/c systems. The other big advantage comes in compressor design choices, because you simply don't have any with a turbo. Turbos have to use centrifugal compressors (although suitable copmpressor sections now exist for just about any application), which isn't necessarily a bad thing, but you can learn more about that in the "Superchargers: compressor design and choices" thread.

Simplicity, reliability, ease of installation and greater design flexibility are the general plus's to crank driven s/c systems. Ultimate power output, tunability and scalability are what the average turbo system has in it's favor. And never forget the bane of all turbo motors; turbo lag. It's not really the huge downfall people make it out to be, but it certainly isn't something the positive displacement supercharger crowd has to deal with. Again though, there's more on that in the other thread (and in threads I am about to write on the subject). Hope this helps explain things, peace.