^That's a good read...now i'm even more split between the two haha

So in the nut shell, 2618 Race piston is aprx 15% stronger that 4032 and if anodized could last as long as 4032(which is what Rob C stated earlier)
The only remaining disadvantage is heat expansion due to low silicone in 2618 which apparently cause piston to slap against cylinder wall on cold starts until normal engine operation temperature is reached.
Talking to JD, he does not even hear piston slap on cold start.
So in real life applications, how big of deal is that?