Seinfeld is the humor seen through Jerry's eyes. He is the most normal of the group and as things revolve around him, it keeps the audience grounded and makes the the show what it is. I would add that who he is as an actor.. the cracking smile, the way he says things with a laugh, adds to the realism of the show. He's not a great actor.. and in a way it makes us feel that what is happening is real.

Curb is the humor seen through George's eyes. We all love George, but man, sometimes it is hard to handle. Curb is good, but its a full level down from Seinfeld for me because of this. That's not a knock on Curb honestly, Seinfeld is, IMO, the best TV show ever. But sometimes an episode ends and I am half laughing, half cringing and I honestly need a break. I can't binge Curb.