In God of War, you mash square and triangle, occasionally holding in L2, and pressing Circle to initiate bad ass interactive cutscenes.
In Devil May Cry, you mash square over and over again forever. If you're Nero, you get to press Circle to do some incredibly lame stuff with his blue fist. If you're Dante, you have one useful fighting style and three completely useless ones.
DMC's platforming is better than God of War's, but platforming is more like the supporting act in combat games, not the main attraction.
Also, I've now played God of War 3 three times, whereas I played Devil May Cry 4 once, went "That was fun" and promptly traded it in.