They still make the Structure? I've been out of the game for a while, but I used to work at a running store a few years ago. If the Pegasus was supposed to be their mainstream neutral daily trainer, the Vomero was supposed to be the more premium, more cushioned option, and the Structure was supposed to be the stability version with some medial posting. Mind you that neither of them went too far in either direction. There are way cushier shoes than the Vomero, and way more stable shoes than the Structure. They were still in the same family as the Pegasus and honestly didn't do anything drastically different with them.