HEVC (x265) offers better compression, but x264 has wider hardware compatibility (older phones, smart TVs, game consoles). For 1080p, the file size difference is not massive.
The filename Rocky.Balboa.2006.1080p.UHD.BluRay.x264.DD-5.1-... describes a common but illegal re-encode: a 4K disc downscaled and compressed to 1080p with lossy audio. While the technical concept – downscaling a high-quality master – has merit, the execution in pirate releases is inconsistent. You risk bad color conversion, overly aggressive compression, and missing bonus features. Rocky.Balboa.2006.1080p.UHD.BluRay.x264.DD-5.1-...
If you are a fan, the 2024 4K UHD Steelbook release is worth it for the improved picture quality, the new Director's Cut, and the stellar Dolby Vision grading. It offers a much more cinematic experience than the previous 1080p Blu-Ray, handling the difficult mixture of film and digital video much better. HEVC (x265) offers better compression, but x264 has