Neither was Nog and I don't think Hendo and Big Nog were quite in their primes yet either when they fought.
Oh I know the match up is different I just still think Hendo keeps it on the feet too long and is too dangerous in scrambles, he's KOed some of the greatest fighters in MMA during scrambles and Dan has strong dirty boxing and greco too.
I was just trying to use a common opponent to gauge their wrestling and clinch games against though it's still difficult since the fights were so far apart, but it's something to consider.
I do agree that Couture has a better chance in an octagon and Dan an even better chance of winning in a ring but I favor Dan regardless of the environment.