You're really going to argue using a 8 inch model of an X wing?

For anything with motion, K'nex wins.  For anything structural, K'nex wins.  I'll give the detailed modeling to Lego, but it is only because they make custom parts for each model.

Besides, if you want to show Lego is bigger and better you need something like this:


Edit: Oh shit, those are people.  I withdraw my first sentence, but once again custom parts for each model .