Difference between an OS Giken twin plate clutch kit and a Supertec Racing 9.1kg (20lbs) clutch kit

Difference between a lightweight Supertec Racing 7.25" 9.1kg (20lbs) twin plate clutch and flywheel kit compared to an OS Giken twin plate kit 13.7kg. As you can see the engine builds up revs a lot faster due to lighter flywheel and lower moment of inertia. This clutch is fitted to an R33 GTR.
Road test video will be made soon so you can see the difference - We notes huge improvement in acceleration in the lower gears 1-3. A carbon prop shaft was the icing on the cake with this clutch and complimented it very well.
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