For most viewers on a 55-inch TV from 8 feet away, the x265 1080p version is indistinguishable from the original BluRay.
To fully interpret, check the full filename on any indexer. A complete example might be: Monsters.Inc.2001.1080p.BluRay.x265.HEVC.DTS-HD.MA.5.1-SARTRE.mkv Monsters- Inc. -2001- -1080p BluRay x265 HEVC 1...