Sachs performace clutch

[Peskarik]

Anyone had it installed on E30?

Was reading here about lighter one-mass flywheel and wonder what the following means in reality:
"Light weight flywheels keep less inertia in storage" - car wil be jerky or something?
"Due the lightened one-mass-flywheel, additional clutch and gear noises can appear." -how bad is it?

http://www.sachsperformance.com/EU/sachs-race-performance-clutch/audi/audi-a3-8p1-ab-0503/20-tdi-mkb-azv/torsionsgefederte-scheibe-mit-organischen.htm

Or maybe no need for lighter flywheel?

http://www.sachsperformance.com/EU/sachs-race-performance-clutch/audi/audi-a3-8p1-ab-0503/s3-quatto-195kw/sre-performance-kupplung-set-2.htm

WHO THINKS WHAT?