Both models support 4K 3840 x 2160 resolution, ensuring sharp picture quality with detailed visuals for movies, shows, and gaming. Both TVs come in similar screen sizes, making them suitable for comparable viewing setups and room environments. Both TVs provide standard built-in audio performance suitable for regular usage, though external speakers can enhance the experience. Both TVs provide decent motion handling, making them suitable for everyday viewing including sports and action content. From a practical standpoint, both options provide a reliable viewing experience for most users. Both TVs offer adequate brightness levels suitable for most indoor lighting conditions. Both TVs come with smart platforms that support popular streaming apps and voice control features. Mi QLED TV 4K 55 and Haier 55S800QT are two competitive smart TVs offering a mix of display performance, smart features, and overall value for different types of users.

Verdict: Choosing between Mi QLED TV 4K 55 and Haier 55S800QT depends on your usage, whether you prioritize display quality, smoother motion, or smart features.