Cylinder Head: Bigger inlet valves, raised inlet port of a different size, exhaust port is marginally different but it's nothing worth writing about, valve springs are different, cams (both) are different, obviously the inlet cam pulley is different, combustion chamber is different, VVT system is obviously in there, even the rocker cover mounting bolts are different

Block: Different pistons and rods, sump may be different too?

Misc: Different inlet and exhaust manifolds, the fuel system is completely different (returnless)