They're both garbage.
Seinfeld = A bunch of yuppies whining about trivial things "what's the deal with toast, why does it make that annoying sound, I don't like toast" and then BAM!! the whole episode is centered around toast. Then Kramer will do something stupid, hilarity ensues.
Friends = A bunch of yuppies sitting around talking and doing things that are so unfunny that stupid people think they're funny.