Both models support 1920 x 1080 resolution, ensuring sharp picture quality with detailed visuals for movies, shows, and gaming. 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. Audio output differs between the two (24 W vs 2 X 10 W), which can influence overall sound clarity and loudness. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. 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. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. Realme Smart TV X40 and Mi Xiaomi TV A 43 FHD 2026 are well-equipped smart TVs that aim to provide a balance of picture quality, performance, and smart capabilities.

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