oh man, they are both really good shows, but I have to admit, family guy DEFINATELY gets more views AND laughs. It's just such a great show, but simpsons is pretty good too.
Simpsons is getting stupid now because of the new writers, but it was definitely better. Simpsons can incorporate jokes and really good humour into a nice and even plot whereas with Family Guy, they use random flashbacks and crap like that but its still funny. Not only that, but Family Guy is funnier because it has more mature comedy than Simpsons. Family Guy isn't something you would always watch with your parents but with Simpsons, its humour everyone can enjoy.
I haven't really watched family guy....so I can't judge it but by what i've seen of it, it looks better. I shall start watching it