>>8141139Ultra Act are about an inch and a half or so larger, and generally suffer from older engineering. They went for a more stylized look as well, so they had thinner, more superhero-ish proportions where the Figuarts are typically designed to look more like a man in a suit. This includes typically more detailed sculpts with things like wrinkles, mask defects, and zippers showing up on the Showa ones. In my opinion the Figuarts are way better from an articulation and design standpoint, but that's also because the few Ultra Acts I have all suffer from floppy joints and loose limbs.