While I can not speak to the exact scenario here, I would say that if some minor difference is noted, it would not scare me from giving it a try, as I have been having a good string of luck with AM pistons (Golf included) in reclaimed cylinders, even though piston was a bit different than the OEM ones they replaced. So far the vast majority have boosted performance and not hindered it. Also I would add that I tried to "mock up" the squish scenario with OEM piston while waiting for AM one to arrive, this did not work as piston height was not always the same, learned to do squish with exact parts to be used. Whole P&C AM kits are another hit and miss story however. Would like to see what you find out here, not always fun taking a gamble, only is when you win. SS