There is a difference in screen size (39 Inch (99 cm) vs 40 Inch (102 cm)), and a larger screen generally provides a more immersive viewing experience. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. VU VU-39E7575 and Sansui SMC40HB21C differ in resolution (1920 x 1080 vs 1366 x 768), which can affect overall clarity and sharpness of the display. If you're comparing VU VU-39E7575 and Sansui SMC40HB21C, 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 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. Overall, both models are capable choices in their segment, offering a balance between performance, features, and usability.

Verdict: Choosing between VU VU-39E7575 and Sansui SMC40HB21C depends on your usage, whether you prioritize display quality, smoother motion, or smart features.