The Sennheiser HD 800 S is a high-end headphone with excellent audio reproduction and durable construction. However, the Sennheiser HD 8XX is not a recognized product and cannot be compared. If you're looking for a high-quality headphone, the Sennheiser HD 800 S is a good option, but be aware of the high price point (per CNET, Wirecutter, Tom's Hardware).