Both of these fighters could be labelled as con men at present. But after watching Tua's fight with Barrett I feel that Tua is probably shot beyond repair. Tua has had the better career despite not winning a mojor title, but right now even Briggs is probably better. Tua wouldn't win a single round against a Klitschko, and would be in danger of being stopped for the first time in his career, as even his chin seems to have softened up a bit. Briggs on the other hand, might at least make it interesting for a couple of rounds.
We might start seeing some of the heavyweights retire soon. Hopefully they don't need too much money and retire while they still have some self respect.