Overall, both models are capable choices in their segment, offering a balance between performance, features, and usability. Both TVs come with smart platforms that support popular streaming apps and voice control features. Intex LED-SH4007+HD features a 40 Inch (102 cm) screen while Panasonic TH-43MS660DX comes with 43 Inch (109.22 cm), which can make a noticeable difference depending on your room size and viewing distance. Intex LED-SH4007+HD and Panasonic TH-43MS660DX differ in resolution (1366 x 768 vs FHD), which can affect overall clarity and sharpness of the display. 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. Intex LED-SH4007+HD and Panasonic TH-43MS660DX 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.