Not sure out if these two who has the worst stamina . I'm going for Bruno to win by stoppage purely because Biggs legs will go by the 6th and I feel Bruno has the greater will to win out if the two . Once Biggs loses his legs Bruno's pole of a jab will quickly discourage and wear down Biggs and Bruno's right hand will hurt Biggs . the ref will stop the fight around the 8th Bruno will look bad for the first three or four rounds though .
One of the rare fights where Bruno gets stronger late in the fight, only because of the guy in front of him
I think Bruno's power would be the difference. I'd expect them to be landing around the same amount of punches but Bruno's to be much more damaging. I think he'd knock Biggs back with the jab and rock him with his right hand and left hook. I'd expect Bruno to get to get a knock out around the 5th or 6th round.