the raging inferno is discontinued but had a lower rg core and a low load particle coverstock. the goliath has a medium rg core but the most aggressive particle coverstock ever put on a bowling ball. brunswick had to change their hook rating scale to accomidate the goliath. the raging inferno was a particle pearl and the goliath is a solid particle. the word "proactive" was a brunswick trademarked word for particle coverstock.