Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. 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. Sansui S40P28FN features a 40 Inch (102 cm) screen while Sansui S43P28FN comes with 43 Inch (109.22 cm), which can make a noticeable difference depending on your room size and viewing distance. In general, both TVs cater to modern entertainment needs, including streaming, gaming, and everyday viewing. 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. Sansui S40P28FN and Sansui S43P28FN are well-equipped smart TVs that aim to provide a balance of picture quality, performance, and smart capabilities.

Verdict: Both models offer good value, and the better option depends on your specific requirements and viewing preferences.