such more and bigger oil holes for the wrist pin and ri. The forging and machining seems to be better (just opinion). But you're right. The skirt is shorter, the valve pocket is not as deep as the wiseco and the oil squirter relief is just barely enought to clear. We have to further file it down to have more clearance.
We have built Z with CP,Wiseco and JE here and we'll see which one is better. Though it's not a fair comparision since they range from sport 500 to TD06-20G :)