in short, they both force air into the TB. hence why they are referred as "Forced Induction systems" or FI.
a turbo uses exhaust gases to push its spool, thus having a lag on it, before it gives its full boost. Known as "turbo lag"
a Supercharger is spun by the serp belt, giving instantaneous full load. No lag here. The downside is many trannys/engines cant handle the increased load of power, immediately. (w/o upgrading them)
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