Both TVs come with smart platforms that support popular streaming apps and voice control features. TCL 58S455-CA features a 58 Inch (147 cm) screen while SkyWall 55SW4K-VS comes with 55 Inch (139 cm), which can make a noticeable difference depending on your room size and viewing distance. Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. Overall, both models are capable choices in their segment, offering a balance between performance, features, and usability. 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 provide decent motion handling, making them suitable for everyday viewing including sports and action content. 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. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions.

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