He thrashed Thor before. Was Wonder Man fully angered or focused in West Coast Annual? Didn't look like it to me.
Wonder Man Thrashing a Classic Thor:
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I'm just saying Thor has never battled Wondie when fully angered or focused. Foes like Ultron and Abomination found that out the hard way. The same goes for Wondie, he has never battled a warrior madness Thor/Angered Thor.
Niether one of them was berzerk if that's what you mean. They smacked eachother around inconclusively until Thor got fed up and went for the super-energy-windup-hammer-throw, which dropped Simon instantly. Nothing against Wonder Man there, Thor usually saves that sort of attack for Jormungandr and the like.
you have to remember that current Wonderman is more powerful than the Wonderman version from the calssic Thor fights..... and it's been theorised that his new energy coated look gives him additional levels of durability