Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. Skyworth 98SUE9580 and Skyworth 100SUE8600 are well-equipped smart TVs that aim to provide a balance of picture quality, performance, and smart capabilities. From a practical standpoint, both options provide a reliable viewing experience for most users. Skyworth 98SUE9580 and Skyworth 100SUE8600 offer different motion rates (120 Hz vs 60 Hz), which can impact smoothness during fast-moving scenes like sports and gaming. Both models support 4K 3840 x 2160 resolution, ensuring sharp picture quality with detailed visuals for movies, shows, and gaming. Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. There is a difference in screen size (98 Inch (249 cm) vs 100 Inch (254 cm)), and a larger screen generally provides a more immersive viewing experience. Both TVs come with smart platforms that support popular streaming apps and voice control features.

Verdict: Both TVs are strong contenders, and your final choice should depend on your preference for screen size, motion performance, and smart features.