The Crosstown comes a lot closer to the Armadillo in beefiness.
Size, quality, and weight play roles in toughness. The Urban Max
weighs close to a pound less. That is a huge difference. Btw, the weight difference is an estimate, you can't trust advertised specs.
Nothing against Specialized, it's just everyone seems to go there when they want a tougher tire. There are other tires I like better (of course, if I was living in the desert it might be a different story) There's a review of big tough tires on one of the Brit cycling mags this month. Pretty interesting stuff.