Dark Elves were better characters, less intricate but better overall design in my opinion. It was more inspired. As for a fire fight, I'm torn. The Dark Elves have the superior weapons it seems, especially those grenades. But the vast number of soldiers the Chitauri have, plus the whales would make things very interesting. I'm thinking the whales would make a huge difference. The only chance to stop them is those grednades and I'm not totally sure they could make that happen while dealing with soldiers on the ground and the chariots. And don't tell me Kurse could bring the whales down himself. Hulk struggled, and Kurse is nothing like Hulk.