seen a few diff and very effective builds which make short work of STF runs
Friend of mine runs
Forward, 5x DHC
Aft 1x turret and 1 borg cutting beam
Forward- 3xDHC, 1 Wing Weapon, 1 QT
Aft- 1 turret and borg cutting beam
remember to spec into your ship,(ie points in torp if you use), wep power and get doffs to support your build like my Kumari (engineering one, might have gotten the name wrong) I run 2 LT engineers (one in universal slot) and then run 2 copies of A2B with 3 doffs to support A2B which dramatically reduces CDs and keeps power levels very high.
In pvp lots use your style with DBB and copies of CRF for solo kill dps while the stf guys normally run CSV and Spreads to deal with all the mobs easier.
edit- both those ships above are using Andorian phasers, one of my toons uses AP which is better dps but my Andorian, flies an Andorian ship so might as well use andorian phasers
Last time I've used the Wing cannons (first week) they didn't perform very well. They actually lost damage while using scatter volley, I'm sure they have fixed it, but as that is the only thing that is different between your 2 setups, they have to be the problem.