Both TVs come with smart platforms that support popular streaming apps and voice control features. If you're comparing TCL 58S455-CA and Mi TV X55, both models come with modern features and are designed to deliver a solid viewing experience across different use cases. 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. Overall, both models are capable choices in their segment, offering a balance between performance, features, and usability. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. 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. TCL 58S455-CA features a 58 Inch (147 cm) screen while Mi TV X55 comes with 55 Inch (139 cm), which can make a noticeable difference depending on your room size and viewing distance.

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