For the record, there was enough variability in the original formulation to allow for a certain degree of variation when matching it with a modern blend, some modern blends are obviously allot closer than others (Alltrim, BEA, Badelson, etc.). I haven't seen ANYTHING from any vendor that comes from a rattle can that get's close to my original samples (used and NOS). At any rate It's a highly subjective topic which is why these debates may rage on forever.
Due to the changes in available flakes and other paint componants I doubt there are really ANY modern formulas that are "perfect" due to the differences in available materials.