Both TVs come with smart platforms that support popular streaming apps and voice control features. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. Audio output differs between the two (10 W + 10 W vs 30 W), which can influence overall sound clarity and loudness. 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 offer adequate brightness levels suitable for most indoor lighting conditions. TCL 58S455-CA and Mi TV X55 are two competitive smart TVs offering a mix of display performance, smart features, and overall value for different types of users. From a practical standpoint, both options provide a reliable viewing experience for most users. TCL 58S455-CA and Mi TV X55 differ in resolution (UHD vs 4K 3840 x 2160), which can affect overall clarity and sharpness of the display.

Verdict: Choosing between TCL 58S455-CA and Mi TV X55 depends on your usage, whether you prioritize display quality, smoother motion, or smart features.