The Gaviota 2 doesn't have quite the same priorities as the Mach 2. For starters, it's a stability shoe, rather than a neutral model. This means it caters more to runners who want to manage overpronation. Its cushioning isn't quite as responsive as the Mach 2's, but it strikes a balance between plush and responsive. Instead of the early-stage Meta-Rocker, you'll find the late-stage Meta-Rocker, which helps stabilize your forefoot. If you're looking for the lightest option, the Gaviota 2 probably isn't for you. It weighs 10.6 ounces with a 5mm heel-toe drop.