70 plum crazy vs 2018 plum crazy paint

Not sure about the OPs question but i wanted to say I have seen two different mixes over the years of Plum Crazy, one has more silver in it and actually looks silver when compared to the other which is more Purple. I dunno if the mixing shop is skimping on ingredients or what and i also think brand has something to do with it. Dupont Chroma base vs Nason for example.