The Asics Gel Kayano 31 excels for stability-focused daily training with 400+ mile durability per Runner's World and RunRepeat data, while the Nike Vaporfly 3 prioritizes race-day speed with 8 mm drop and carbon plate. Kayano wins on longevity and value for most runners; Vaporfly suits only elite racers needing minimal weight. Direct comparison shows Kayano better for pronation control by 4 mm ...