Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. TCL 50S435 and TCL 50S446 are well-equipped smart TVs that aim to provide a balance of picture quality, performance, and smart capabilities. Overall, both models are capable choices in their segment, offering a balance between performance, features, and usability. Both TVs come in similar screen sizes, making them suitable for comparable viewing setups and room environments. Both models support 4K 3840 x 2160 resolution, ensuring sharp picture quality with detailed visuals for movies, shows, and gaming. 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. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content.

Verdict: Choosing between TCL 50S435 and TCL 50S446 depends on your usage, whether you prioritize display quality, smoother motion, or smart features.