Season 7 episode 7
That would be Stewie Griffin: The Untold Story
Fourth Season
The episode where they first meet is season 3 episode 18 "From Method to Madness". The one where they get married is season 5 episode 7 "Chick Cancer. It is also where Stewie was yelling at the dinner table.
Meet the Quagmires is episode 18 of season 5 of Family Guy.
From Method to Madness
"Funny" or "Better" are too subjective to really provide a definitive answer for this question. It simply depends on your sensibilities, taste and what you find funny.Now if 20 people vote Family Guy & 10 vote American Dad, it could suggest that Family Guy is preferred over American Dad but that still doesn't necessarily mean it IS funnier.
Meet the Quagmires
It's called "I Dream Of Jesus"
"He" ... exactly who is the "He" you speak of ?Brian, Stewie & Mort go into the past in Road to Germany.Peter & Brian go into the past in Meet the Quagmires.Stewie, Brian & Bertram go into the past in The Big Bang Theory.Stewie & Brian go into the past in Back to the Pilot.Stewie travels into the past (& future) in The Untold Story.
They meet in episode 163. The episode is released now.
they meet songo in episode 24
They meet in episode 1