Mine never matched from day one....its just a fact of life with white cars. What they told you about the paint looking different on different material body panels is true. I've had several white cars from multiple manufacturers and they looked like that. I have also worked for Nissan, Honda, VW, and Dodge over the years and for the most part all white cars are the same when it comes to that.
2011 GT 6MT performance white
base w/ 3.73's, GT500 axleback