Both TVs come with smart platforms that support popular streaming apps and voice control features. Skyworth 75S1 features a 75 Inch (191 cm) screen while Haier H77C90EUX comes with 77 Inch (195.58 cm), which can make a noticeable difference depending on your room size and viewing distance. Overall, both models are capable choices in their segment, offering a balance between performance, features, and usability. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. Skyworth 75S1 and Haier H77C90EUX offer different motion rates (60 Hz vs 120 Hz), which can impact smoothness during fast-moving scenes like sports and gaming. Both models support 4K 3840 x 2160 resolution, ensuring sharp picture quality with detailed visuals for movies, shows, and gaming. Skyworth 75S1 and Haier H77C90EUX are two competitive smart TVs offering a mix of display performance, smart features, and overall value for different types of users. Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience.

Verdict: Both models offer good value, and the better option depends on your specific requirements and viewing preferences.