Having tested the SK-6808 extensively, I can confidently say it’s a significant upgrade over the 5808. One notable improvement is its enhanced detection capabilities, especially in detecting low-energy fires. The SK-6808 also boasts improved sensitivity to smoke particles, offering quicker and more accurate response times. Additionally, its updated design allows for easier installation and maintenance. Overall, the SK-6808 is a worthy successor to the 5808, offering superior performance and reliability in fire detection systems.