I actually prefer CYE to Seinfeld too. I watched all of Seinfeld first and only watched CYE because a friend recommended it, then I became hooked. I think its because of a combination of the swearing (for me anyway) and Larry going further than George in questioning social conventions. That's not to say I don't like Seinfeld, I rank it #2 behind CYE as my all time favourite comedy, or series even. Really can't wait for season 8 of CYE
CYE is more rougher around the edges than Seinfeld
Your kids can watch Seinfeld, but I wouldnt recommend your kids watch CYE
Some people (simpletons) find it hard to laugh at comedies that dont have the live audience