To be fair, it is side content and replay value, I was just getting lazy about writing it all out. Since side content is optional, it stands to reason it would affect replay value since you can choose to skip it or not.

I feel the one factor I would point about concerning side-content replay value here is that CT is designed with pre-built optional stuff to do for replay value, whereas VI's mechanics allow for more player driven challenges like CES, natural magic, or no control style replay value. Just some food for thought...