I have been experimenting with both in sPvP and WvWvW as a means of CC (or at least the second C) for some time now, and both seem to have their pros and cons.
Hammer
Pros: Wide attack radius, two KD skills, one KB skill, can inflict weakness and cripple.
Cons: No blocking skill, longer recharge on most CC skills.
Dual Mace
Pros: Faster recharge on most skills (including long-range KD), two stunners, blocking skill, can inflict weakness and vulnerability
Cons: Not ideal for a spread-out group, third “auto-attack” is rather slow.
I should probably also mention that I tend to pair one of these with the rifle for a ranged weapon.
Does anyone here have any experience with these weapon setups? Although I find the hammer to be more versatile in general, m/m seems to be faster/“burst-ier”. Any thoughts?