It appears that there is a slight misunderstanding in your question. AfterShokz is the name of the company that manufactures bone conduction headphones, while Aeropex is one of their headphone models. If you meant to ask about the difference between the AfterShokz Aerope and the AfterShokz Aeropex, here's a comparison of the two models: 1. Design and Build Quality: Both the Aerope and Aeropex models feature a lightweight and comfortable design. However, the Aeropex model is designed with a slightly slimmer and more refined profile, resulting in a more comfortable fit and lighter weight. 2. Sound Quality: The Aeropex model offers improved sound quality compared to the Aerope, with richer bass and reduced sound leakage. This is achieved through advancements in bone conduction technology and the use of PremiumPitch 2.0+, which enhances the overall audio experience. 3. Battery Life: The Aeropex has a longer battery life, offering up to 8 hours of continuous playback compared to the Aerope's 6 hours. This makes the Aeropex a better option for those who require extended listening sessions without frequent charging. 4. Water Resistance: Both models are water and sweat resistant, but the Aeropex has a higher IP rating (IP67) compared to the Aerope (IP55). This means the Aeropex is more resistant to water and dust, making it suitable for more rugged outdoor activities and workouts. 5. Price: The Aeropex is generally priced higher than the Aerope, given its improved features and performance. The price difference may vary depending on the retailer and region. In summary, the main differences between the AfterShokz Aerope and AfterShokz Aeropex headphones are the design, sound quality, battery life, water resistance, and price. While both models provide a comfortable and enjoyable listening experience, the Aeropex offers more advanced features and better overall performance.