it also depends on the level... for example:
A group xp'n at xrags and all u can get is a 50 melee or wiz. Both the melee and wiz's abilities will hit for 0. But their melee hits will hit for 10-20 or so. Melee with quad will do little more dmg lol.
it jsut depends on the situation, learn how to play each dd correctly and how you can make it do monsterous damage.