piston heads?

which is better for boost the stock d15b2 piston heads or the d16y8 heads?

would the b2 piston heads offer lower compression over the y8 heads... but i know the y8 heads should be stronger.... advise please? thanks

you talking about pistons or heads ?

let me clarify..... Iwas a little drunk when i wrote that last night.

im talking about the pistons.