The Kong extended edition is rather a different beast than the extended LoTR movies. Rather than dramatically adjusting the plot and pacing, most of the additions to the extended King Kong are relatively minor. Some of them (a Ferrucutus is riled up by the sound of gunfire right after the expedition enters the jungle) are pretty disposable (because, I thought, the Brontosaurus stampede was a better introduction to the dinosaurs), but the highlight is a five minute long Piranhadon attack sequence in the swamp. It's exciting, well paced, and should've been left in the movie instead of, say, the ice-skating Kong sequence.