The Powerbeats3 Wireless offers twice the battery life (12 hrs vs 6 hs), potentially 10 times the wireless range (10 m vs 1 m) if paired with a Class 1 Bluetooth device, and faster charging (30 min of use with 5 min of charging vs 6 hours of use with 90 min charging) versus the PowerBeats2 Wireless. The Powerbeats3 Wireless also offers better ergonomics, control buttons, and integration with Siri.
For those that want a larger over the ear headphone with wider audio frequency range, the Solo3 Wireless and Solo2 Wireless are the way to go.
When comparing the Solo3 Wireless with the Solo2 Wireless, the Solo3 Wireless also has longer battery life (40 hours vs 12 hours), potentially 10 times the wireless range (10 m vs 1 m) if paired with a Class 1 Bluetooth device, and faster charging (3 hours of use with 5 min of charging vs 12 hours of use with 120 min of charging). The Solo3 Wireless also offers better Siri integration.