The Total Chaos ones give you more caster from what I recall. And the caps are a gimmick. I took them off of my Billet ones so that the Uniball can breath.
Is there a reason for changing from the Camburgs with bjs? I have the camburgs on backorder with Wheeler's. Just wondering if they failed or you just upgrading?
The caps also don't stop mud, water, etc. from getting into the uniball from underneath. Just seals the moisture in so they take longer to dry.