Jim Quinn beat Mike Quinn in the WBF (4th place in 1991, 2nd place in 1992; Mike Quinn never made the top 5).
Mike Quinn, however, beat Jim Quinn in the IFBB, particularly in the 1994 NOC, where Mike placed 5th and qualified for the Olympia. Jim Quinn never qualified for the O.
But, here they are from 1991.
Mighty Mike Quinn:
"The Future" Jim Quinn: