i think south park episodes are funner but the jokes in ffamily guy are funnier just on family guy it doesnt have good episodes it has good jokes and southpark has good episodes
i seen the best episodes from both cartoons, south park has more sexuel refences and is very funny if you understand it, family guy has more jokes in it but its harder to understand e.g. the latest star wars thingy they did wasn't funny unless you've watched starwars
conclusion south park make jokes on things that more people know about e.g. Hitler which almost everone knows about