BoxRec

If Don King would've pit both in a WBA/WBO unification, that would've trumped Valuev's mandatory against Chagaev and Briggs' mandatory against Ibragimov...

Who would've won in an early 2007?

I'd have to favor Valuev. He took a shot pretty well, and his big size and physicality would wear down Briggs who was always known for having stamina issues even under the best of circumstances.