At first glance dual wielding two weapons and two handing a single large weapon seem to be competing to fill the same role of martial damage per round. However, I have the feeling that like in past systems each fills its own niche and neither is better than the other for every situation. For example there was a tendency for rogues to prefer dual wielding to sneak attack as much as possible.
I'm currently playing a dwarf cleric with the war domain using the play test rules. Our DM is letting us tweak our characters when we convert them to the using the PHB. I currently wield a maul but was wondering if it would be beneficial to switch my weapon of choice. My highest stat is WIS (16) followed by STR (14) then CON and DEX (both 12). I want to be able to hold my own in melee combat while also casting spells when needed. The rest of my party is a rogue, a dual-wielding, dexterity based fighter and a bard.
What are the significant differences between dual wielding and two-handing for a cleric?