Powerbeats 2 and Powerbeats 3 are essentially the same, most especially when you check certain features and qualities of the two headphones. However, you start to notice some of the differences by considering certain designs of powerboats 3, which are not present in powerboats 2.
You might not notice any difference in their design because both come with designs that make them fit perfectly on the ear. The silicon hooks and the multiple ear tips are essentially the same. However, the ergonomic design of powerboats 3 is one of the major differentiating features of the two headphones.
As explained earlier, both are made with designs that make them stick to your ears for hours even while working out, but powerboats 3 is equipped with a toggle with makes it fit perfectly when placed at the back of one's neck. Another advantage of powerboats 3 over powerbeats 2 is the battery life of the former. With powerboats, you can enjoy a playtime of approximately 12 hours.