I would think someone has pointed out the differences before, but I can't find a thread on it, other then the amg version being assembled by hand, and other then the ovious sc related components, what parts are actually different internally in the 3.2l engine?

 

Pistons, lower compression to allow boost which raises compression.

 

Just a guess but I would not be surprised to find that the crank, rods, pistons, valve springs and maybe even the valves and/or rockers were a bit beefier.