Anotero, what section of the service manual did you find the gap info? I'm combing thru the manual via the electronic files I downloaded from erWin and can't find it.
The only way to know for sure is to download a repair manual for a MQB vehicle with steel and a MQB vehicle with aluminum subframe. For one day worth of printing, it's $35.00 USD with Volkswagen.
https://erwin.vw.com/erwin/login.do
What's your priority aesthetics or track oriented performance? To meet strictly aesthetics, I would go with the Fully Adjustable Fronts and Rear. Specifically, street fronts and sport rears. Shoot me a zip code for the shipping quote.