I think a lot of the peonies labeled coming from the Dutch to mass market here are commonly mislabeled. The average big box store buyer sees it as a pink or as a white and that's the end of it. Also of note, different stages of bloom can vary in the colors that are more or less pronounced vs. faded. These can also vary in different parts of the country, with temperatures and soil differences, to a degree. The overall form though, is something that does not seem to vary in an established plant. Comparing photos of a mature plant to a field photo from a reputable grower like Adelmans, Solaris Farms, Hidden Springs etc is a good comparison. First year blooms can be less full as the plant is not get established.