The best method of getting an aerosol to match is to do what Hewittca did by getting a painted piece in front of a supplier that can tint to match.
The reason is that over the years your truck painted the same color as mine, will have a slightly different color all these years later because of the difference in the environment our trucks have been in. One might be left on the deserts of Idaho or Arizona while the other always stored inside.
On an aside, the type of paint won't matter when it comes to color. Color is color is color. The different brands of paint combined with the different paint technologies make no difference when it comes to color match. The way a color is sprayed can (but not always) change the color from the same can of paint.
Disclaimer: certain new tri coat pearls not withstanding.