It seems that there are indeed (some) releases that use advanced compression options. For example, the following release requires the audio-compression module to be disabled (
Full command line:
2006-08-05_rar360.exe a -m3 -mdA -s- -ds -mt0 -vn -o+ -idcd -v50000000b -mcA- output.001 rzr-nfsc.iso
-mcA- flag the compressed output never matches the original.