To me, integrated is an AC system that was designed specifically to suit a particular car, which did not compromise the car. The dealer fitted one is not really integrated is it, you now had two fans with two seperate controls. They had to destroy the glove box to fit it. You would have been spewing if they fitted that system into your new car. The other one they must have fitted heaps, was the one that goes in front of the console. They seemed to chop the front of the console off for them.
I guess the dealers fitted whatever was cheapest, not the best.