True duplicate files are the files with exact content regardless its file name and date. Vistanita Duplicate Finder uses byte-to-byte comparison to find true duplicates, so the duplicates have 100% the same content.

Duplicate MP3s sometimes don't have the exact content. MP3 maybe been processed to change its bitrate, apply sound effect,etc. Yet, there is a way to find duplicate MP3 by comparing its tag such as artist, title and album.

Photos taken from digital camera or downloaded from internet often visually duplicates but have different size, quality, watermarked,etc. Vistanita Duplicate Finder find them by comparing their visual similarity.