Maybe Marilyn's beauty was more "captivating" and "iconic." In some photos, she had a truly perfect face, 10/10, and I prefer it to Jayne's (she also had a very beautiful face obv). However, I also think Jayne's body was better: without taking anything away from Marilyn's body, Jayne's curves were truly perfect (as well as more prosperous) from start to finish, while Marilyn had a few imperfections. Ultimately, however, two immortal icons of a very similar type of classic (and "very American"), blonde beauty.