I just did a test drive on both the '07 Navigator and the '07 Escalade. The BIG difference was the motor and the instrument electronics. The Escalade's ride was very nice as was the handling. The seats in the Navigator were a bit better, as was the 3rd row seating but I saw a drop off in the engineers to incorporate the electronics the way Escalade did. I now own the Escalade. The styling was the major factor in my decision. The Navigator was a bit cheaper even with the options packages. I'm not buying the Escalade for gas savings, but it's nice to know you can use regular gas when it's crunch time!
The instrument panel, the navigation system and sound package, and that motor. The exterior styling is the key!
The third row seating needs to fold flat into the floor and possibly be power driven.
† Edmunds.com received the highest numerical score in the proprietary J.D. Power 2014 Third-Party Automotive Website Evaluation Study℠. Results based on responses from 3,381 responses, measuring 14 companies and measures third-party automotive website usefulness among new and used vehicle shoppers. Proprietary study results are based on experiences and perceptions of owners surveyed from January 2014. Your experiences may vary. Visit jdpower.com.