Found this nice article that actually talks about the differences between the two vehicles. Link to the full article at the bottom.
Here's a part of the article
Close cousins, yet worlds apart
While you will find some similarities between the Accord Crosstour and the new ZDX in terms of shape and overall maneuverability, it's the intricacies that make all the difference in the world. Both vehicles carry the well known characteristics of the modern day crossover, from the increased ground clearance and car-like handling, to the neatly tapered roof line that instantly brands the car with a crossover moniker. However, spending time in both vehicles reveals a world of difference in a few major areas. This is not to say that the Honda Crosstour doesn't deliver as promised, but rather that the much higher price tag you see plastered on the window of the ZDX is in fact for good reason. When I tested the Crosstour for a week, I was impressed to say the least and walked away feeling positive about the new offering. When I took hold of the ZDX for a week, giving it back felt like I was giving away my child. It grew on me after the first hour behind the wheel, and my kung-fu grip was viciously applied to the baby soft leather steering wheel for those seven days. This lead to a moment of slight awkwardness when the woman who was assigned to oversee the car's return to Acura had to repeat herself three times upon requesting its keys.
2010 Acura ZDX - Drastic Makeover - Honda Tuning Magazine