Melankomas was one of the greatest ancient Greek boxers of the time, and Daniel Mendoza was one of the greatest Bare Knuckle fighters of all time. ******ed question but it must be answered; Who would win in a street fight?
We have no idea. If that particular version of ancient Greek boxing included wrestling, then, all things being equal, I might take the Greek.
Very difficult to say, since they are both an unknown quantity, to a greater or lesser extent. The question is essentially whose rule set would prevail, all else being equal.