Better?packMP3 is for a different porpose than mp3packer.
The file compressed by mp3packer is playable, but the file compressed with packmp3 is not playable.
packMP3 compresses a MP3 file the same way an archiver like 7zip does, only the algorithm used by the program is different.
Playable. foobar2000, Command-Line Decoder Wrapper, "packMP3 - < %s > %d"
packMP3 stores only one file per archive.