This one has almost the same pitch as the PBL-30 (Orange) Jam block. I am not sure what the anarchy is all about except maybe it is black and has these spikey things on it. So maybe if you are in a thrash metal band and would be embarassed to have the day-glo orange PBL-30 on your drumkit, this one is for you. The PBL 30 is slightly lower pitched and louder and clearer.