My ranger has the same color, and no issues.
however, the paint match can I got, is ever so slightly different. there are quite a few spots on my truck I've touched up from scratches, and dings, and you can tell if you look close enough. Whereas the gray on my lowers, match perfectly.
white truly is one of the hardest colors to match. So maybe they were painted with two different batches of paint?
either way, I hope you get it fixed to your liking.
White isn't a color. it is defined as completely void of color.