As an experience Vault of Glass will never be beaten. As a technical and team based co op game, Kings Fall is far superior. The two main Team work heavy areas in VoG were Oracles and Atheon. Everywhere else you weren't punished as hard really. But in Kings Fall, I have noticed that many LFG groups either spend most of the time failing over and over at the Glyph and then get to the Warpriest and leave because they lost focus. Or simply just quit. The entire Kings Fall raid requires heavy team work and communication. The only other team based event that was as tricky was Skolas.