There is a difference in screen size (40 Inch (102 cm) vs 43 Inch (109.22 cm)), and a larger screen generally provides a more immersive viewing experience. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. Samsung UA40F5100AR and Philips 43PUT7791-V7 differ in resolution (1920 x 1080 vs 4K 3840 x 2160), which can affect overall clarity and sharpness of the display. Samsung UA40F5100AR and Philips 43PUT7791-V7 offer different motion rates (100 Hz vs 240 Hz), which can impact smoothness during fast-moving scenes like sports and gaming. In general, both TVs cater to modern entertainment needs, including streaming, gaming, and everyday viewing. Samsung UA40F5100AR and Philips 43PUT7791-V7 are two competitive smart TVs offering a mix of display performance, smart features, and overall value for different types of users. Both TVs come with smart platforms that support popular streaming apps and voice control features.

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