that's a big difference in power for sure ! I think the Expedition is a family hauler, and the Escalade is that and more of a hot rod too ?! I have a K&N intake on ours it runs / engine sounds great ! It has the Harley 22in wheels on it so that helps quite a bit, but still stockish looking. We don't like too much aftermarket looking stuff.
that being said ours is a 5.4 3V I don't know what the power / torque is off the top of my head but it runs plenty strong for what it is.