This bra, although very similar to 3550, fit me very differently. It prefers breasts that sit further apart from one another. I did not reorder this bra in a smaller size because I need bras designed for close-set breasts. Looking at the cups, I would not have predicted a fit difference between 3463 and 3550. 3463 has a wider cup and a bit more distance between the cups.
The swirl pattern looks great in person although I was not enthralled by online photos. A more interesting black bra the swirls make.