In case of UTF8, BOM isn't information at all, it's always the same 3 bytes (endianness mark is meaningless on byte-based encoding). And being added by default

In case of UTF8, BOM isn't information at all, it's always the same 3 bytes (endianness mark is meaningless on byte-based encoding). And being added by default Windows plain text editor, it's fingerprinting usefulness is rather limited.