The coatable inks made with different pigments and it will not match the Pantone book 100%. Most times, the color will be dirty to the PMS book. Some reds will either be bluer or yellower, some blues will be redder or greener and yellows will be redder or greener or dirtier. The best way to overcome this problem is to ask for color swatches from ink companies on your particulate substrate and with your coating and let the CSR get the color Okayed by your customer. Let them "sign-off" on the swatch with your coating on it. In my past 20 years in printing and inks and I have seen many problems due to the lack of communiation between the printer, the print buyer and the ink companies.
George John