Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. TCL 58S455-CA and SkyWall 55SW4K-VS are well-equipped smart TVs that aim to provide a balance of picture quality, performance, and smart capabilities. Both TVs come with smart platforms that support popular streaming apps and voice control features. There is a difference in screen size (58 Inch (147 cm) vs 55 Inch (139 cm)), and a larger screen generally provides a more immersive viewing experience. Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. From a practical standpoint, both options provide a reliable viewing experience for most users. TCL 58S455-CA and SkyWall 55SW4K-VS differ in resolution (UHD vs 4K 3840 x 2160), which can affect overall clarity and sharpness of the display.

Verdict: Both models offer good value, and the better option depends on your specific requirements and viewing preferences.