The Oura Ring Gen 4 is a better choice for those looking for a comprehensive fitness tracking device, while the Nike Vaporfly 3 is ideal for long-distance runners who need a responsive and springy ride. According to a review by Wirecutter, the Oura Ring Gen 4 has 'excellent' sleep tracking capabilities, while a review by Runner's World states that the Nike Vaporfly 3 has 'outstanding' energy re...