Yes...I have not deadened the doors of the truck yet. I am thinking I will do it in the spring. Also, current plan is to take out the eDi6500's from the rear doors and put them in the Chevelle. That way I should be able to listen to each (CDT or eD) a bit more evenly.
But like Jeff mentioned...the way speakers are mounted and even the vehicle used can change the sound dynamics. If I were really motivated, I would put the eD's in the front of my truck and listen for several months.
But I'm not that motivated...

I'm trying to stay motivated with my bathroom remodels. And that's enough for now...