Starter motor OEM Volkswagen or Duralast

How much more effective is the gear reduction starter compared to using a MK3 starter? I'm running a mk3 8v starter in my '80 scirocco and absolutely love it. Much more effective.

yeah its a pretty common thing, i my self have replaced 4 or 5 of them... do yourself a favor, go to autozone and get the duralast one. they're the same thing as the bosch and have a lifetime warranty. oh and that hasnt been the duralast ive had to replace that much, ive only had to replace it once.