Calculates the MD5 hash of str using the RSA Data Security, Inc. MD5 Message-Digest Algorithm, and returns that hash. The hash is a 32-character hexadecimal number. If the optional raw_output is set to TRUE, then the md5 digest is instead returned in raw binary format with a length of 16

“If the optional raw_output is set to TRUE, then the md5 digest is instead returned in raw binary format with a length of 16.”

What’s the difference when using the raw_ouput option? I know that the length is then 16, but what else is different?