After thinking about X versus Y super-matchups I've concluded that the winner would be… whichever hero the writer of that story wanted to win.
Nobody can rationalize their way to a pre-chosen result like comics writers can. Loopholes, retconning, hand-waves, you name it.
Though this is probably the most accurate answer, it's boring because a) it's out-of-band, meaning the deciding factor is outside the characters' universe, and b) if it's accepted there's nothing left to discuss. For purposes of argument it's better to pretend there are no writers.