The Sony XBR‑55X900F delivers noticeably brighter HDR (≈500 nits vs ≈250 nits) and smoother motion thanks to X‑Motion Clarity, which RTINGS rates 8.5/10 for picture quality, while the Samsung U8000F scores 6.5/10. However, Samsung’s larger 65‑inch screen and lower price make it a stronger value proposition for budget‑focused buyers (CNET). If HDR performance and Android TV’s app ecosystem matte...