Originally Posted by LT6916

the difference:

JRSC: Eaton blower...makes almost linear power from idle until about 6000 RPMs.
Vortech: centrifugal blower...doesn't hit peak power until ~6000 RPMs.

One would opt for the Votech/ATI Procharger/etc only if they want turbo power but with supercharger efficiency (belt-driven, not exhaust driven).

On LS Integras...the JRSC is a waste of money. But GSRs can benefit nicely with a JRSC.