Superman: "Ha nice mallet! That thing come in anything other than kid size?" Thor: "..........." (Thor obliterates Supes with MAGIC lightning leaving a pile of ashes) (Batman and Iron Man watching from a far) Batman: "Told ya. Pay up, Stark." Iron Man: "Dammit!!"
The numbers are on Thor's side. The current New52 Superman's highest feat of strength was lifting the weight of the earth for five days straight without sunlight. The highest feat of destructive power for Marvel NOW's Thor was in the God bomb story arc where he fought Gorr and created shock waves (and only shock waves mind you) from the raw force of his blows that were actually powerful enough to break apart whole planets & moons that were millions of miles aways from him, and those waves were created during a fight by total accident. Imagine if he decided to go on a full on attack. He easily has enough power in him to destroy multiple solar systems.