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. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. If you're comparing TCL 40S355-CA and TCL 40S351-CA, both models come with modern features and are designed to deliver a solid viewing experience across different use cases. Both TVs come with smart platforms that support popular streaming apps and voice control features. Both models support 1920 x 1080 resolution, ensuring sharp picture quality with detailed visuals for movies, shows, and gaming.

Verdict: Choosing between TCL 40S355-CA and TCL 40S351-CA depends on your usage, whether you prioritize display quality, smoother motion, or smart features.