Audio output differs between the two (2 Channel X 8 W vs 20 W), which can influence overall sound clarity and loudness. TCL 55S425-CA and LG 55QNED7S6QA 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. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. TCL 55S425-CA and LG 55QNED7S6QA differ in resolution (UHD vs 4K 3840 x 2160), which can affect overall clarity and sharpness of the display. Both TVs come in similar screen sizes, making them suitable for comparable viewing setups and room environments. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. Both TVs come with smart platforms that support popular streaming apps and voice control features.

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