Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. If you're comparing Intex LED-3900 and Sansui SJX40HB21CAF, both models come with modern features and are designed to deliver a solid viewing experience across different use cases. Intex LED-3900 features a 39 Inch (99 cm) screen while Sansui SJX40HB21CAF comes with 40 Inch (102 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. Intex LED-3900 and Sansui SJX40HB21CAF differ in resolution (1920 x 1080 vs 1366 x 768), which can affect overall clarity and sharpness of the display. Both TVs come with smart platforms that support popular streaming apps and voice control features. 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.

Verdict: Both TVs are strong contenders, and your final choice should depend on your preference for screen size, motion performance, and smart features.