This "updated" release likely addresses issues found in previous encodes or sourced from a superior master. By utilizing HEVC (H.265) , this remux offers superior compression efficiency compared to older AVC releases, ensuring the highest possible picture quality for the file size while maintaining the original bitrate fidelity of the disc.

CM UntamedHeart.1993.1080p.BluRay.REMUX.HEVC Source: Blu-ray Resolution: 1920×1080 Video Codec: HEVC (H.265) Format: REMUX (Untouched Video/Audio)

, this version contains the exact video and audio data found on the retail Blu-ray disc, typically the 2019 Kino Lorber Studio Classics release HEVC/H.265 Encoding

It looks like you're referencing a specific file naming convention for a release of CM: Untamed Heart (likely a fan edit or a specific version of a movie/TV project).