Westinghouse WR58UX4019 features a 58 Inch (147 cm) screen while TCL 55S455-CA comes with 55 Inch (139 cm), which can make a noticeable difference depending on your room size and viewing distance. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. Westinghouse WR58UX4019 and TCL 55S455-CA differ in resolution (4K 3840 x 2160 vs UHD), which can affect overall clarity and sharpness of the display. From a practical standpoint, both options provide a reliable viewing experience for most users. Westinghouse WR58UX4019 and TCL 55S455-CA 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. Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. 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.