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. Both TVs come in similar screen sizes, making them suitable for comparable viewing setups and room environments. Overall, both models are capable choices in their segment, offering a balance between performance, features, and usability. TCL 50S434 and Thomson 50QA2S13 are well-equipped smart TVs that aim to provide a balance of picture quality, performance, and smart capabilities. TCL 50S434 and Thomson 50QA2S13 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. 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.