Shivering Isles is better because you get an entirely new world.(It's spelt Knights)

Shivering Isles has more to it. It's better.

i like ghe knights because it reminds me of the european knights of templar ing the first millennium

I did`nt even know there was eny

It's awesome. I love Sheogorath. :)

How the heck do you finsh and fight umaril i killed jyjalag but imtalkin about Knights of nine?

Their both good. Jyggalag and Umaril are cool. Knights of the Nine is a bit of a pain though but so is Shivering Isles.

Knights of the nine always seemed to me to be a really long "Collect all the cool armor" quest, whereas SI is more like a proper new world.
Albeit, a much smaller crazier one.

I just installed SI and I'm having a blast with it. It was worth the money.

both

Hmm. A choice between the Divines and a Daedra. Daedric Princes are badass!
( only thing I didn't like about Shivering Isles was the fact that if become a vampire and cure yourself it starts the whole expansion over, but all collected quest items in your inventory -- so don't start until the vampirism is cured -- unless you want to keep vampirism forever )