Both TVs come in similar screen sizes, making them suitable for comparable viewing setups and room environments. TCL 50S546 and Leonis LEL 50UHD-4K VR are well-equipped smart TVs that aim to provide a balance of picture quality, performance, and smart capabilities. TCL 50S546 and Leonis LEL 50UHD-4K VR differ in resolution (UHD vs 4K 3840 x 2160), which can affect overall clarity and sharpness of the display. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. From a practical standpoint, both options provide a reliable viewing experience for most users. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. 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.