Not a fucking chance that Gwar is bigger than Cannibal Corpse.
Gwar's most recent album "Bloody Pit of Horror" sold 2,800 copies
in the USA during the first week of release.
Cannibal Corpse's most recent album "Evisceration Plague" sold 9,600 copies
in the USA during its first week.
Gwar have 143k Facebook "likes" and 113k Last.fm listeners. Cannibal Corpse is way ahead at 778k "likes" and 318k listeners.