At the panel level, the Samsung QN98QN90FAF and the TCL 98X11K are built on identical foundations: both are 98-inch QLED Mini-LED LCD panels running at 4K (3840 × 2160) resolution, 45 ppi pixel density, 10-bit color depth, and 1.07 billion displayable colors. Viewing angles are a matching 178° in both axes, and both include anti-reflection coating and an ambient light sensor. For most picture-quality fundamentals, these two sets are effectively tied.
The differences emerge in two meaningful areas. First, the TCL 98X11K pulls ahead on refresh rate with 144Hz versus the Samsung's 120Hz. In practice this matters primarily for gaming and fast-motion content — the extra headroom can reduce motion blur and judder, and it pairs naturally with high-frame-rate PC or console sources. Second, and arguably more significant for a wide range of viewing scenarios, the TCL supports Dolby Vision while the Samsung does not. Both sets handle HDR10, HDR10+, and HLG, but Dolby Vision uses dynamic, scene-by-scene metadata that typically produces more precisely graded highlights and shadows on compatible content from streaming services like Netflix and Apple TV+. The Samsung's omission of Dolby Vision is a real gap for users who consume a lot of streaming HDR content.
Both televisions share the same AMD FreeSync Premium Pro adaptive sync stack, so variable-rate gaming performance is equal. Overall, the TCL 98X11K holds a clear edge in this display group: its higher refresh rate is a tangible plus for gaming and motion clarity, and Dolby Vision support broadens its HDR compatibility in a way the Samsung simply cannot match at the panel spec level.