Roshi takes this one. In terms of destruction, speed and reactions Roshi is ahead. Dugan is probably more durable and arguably physically stronger, but it wouldn't be enough to win.
But remember, this is SKRULL Dugan, which means that he also has morphing abilities. He also has pyrokinesis.
It’s way too long, haphazardly plotted and teases on being more than a joke machine without really following-through, but I laughed more at Anchorman 2 than almost any other comedy this year.