Originally posted by PhilosophíaNo, he lost because he didn't want to kill the heroes fates who were tied in with the Am.
Spectre lost because of his self-imposed limitations - he was flat-out stated to have been more powerful than Anti-Monitor in the following Spectre series.But if by full power you mean the Spectre from the end of the Ostrander series, that one was basically as powerful as his master - he stomps.