Dunno about this one. Did Marciano ever fight a puncher in Tua's league? Marciano by decision, provisionally,,,,,
I don't see the fight going the distance, though for some, that will raise eyebrows. If Marciano wins, he'll adjust to Tua's jaw (if he can't crush it --- but don't rule that out just yet) & pummel his ribs until Tua quits on the stool, his heart taken out of the fight. If Tua wins, it's because he caught Marciano & finished him. I have to go with the guy who has the hard yards in the bank. Marciano TKO9 Tua.