On the question rating level what's the difference between Family Safe and Non-Adult?

Good question, I like to look at it as "E for everyone" or rated "PG" lol so family safe is probably zero controversy, like talking about fluffy animals and unicorns, then "non adult" is probably when it's nothing particularly adultish, but also not 100% family friendly, so maybe like Shrek the movie, ya know it's not "adult" but there's adult humor slipped in every now and then and action/fighting, so it's not exactly fluffy unicornish either