From a practical standpoint, both options provide a reliable viewing experience for most users. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. Intex LED-4010 and Intex LED-3900 are well-equipped smart TVs that aim to provide a balance of picture quality, performance, and smart capabilities. Both TVs come with smart platforms that support popular streaming apps and voice control features. Intex LED-4010 features a 40 Inch (102 cm) screen while Intex LED-3900 comes with 39 Inch (99 cm), which can make a noticeable difference depending on your room size and viewing distance. 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. Both models support 1920 x 1080 resolution, ensuring sharp picture quality with detailed visuals for movies, shows, and gaming.

Verdict: Choosing between Intex LED-4010 and Intex LED-3900 depends on your usage, whether you prioritize display quality, smoother motion, or smart features.