ACE is a compressed file format used to bundle multiple files into a single archive. ACE files are created using the WinACE compression utility, which provides high compression ratios. ACE files can be opened with compatible software and are often used for distributing software, large datasets, and media files.
7Z is a compressed file format used by the 7-Zip software. It provides high compression ratios, making it ideal for compressing large files and directories. 7Z files are compatible with several file archivers, including the free 7-Zip utility, which can compress and extract files from 7Z archives.