I built my dual throttle back in June and I can say without question it gets me in more trouble than it is worth. Heaven help you don't keep those both engines in sync during low speed high AoA maneuvers, you'll find yourself spinning, falling much lower than the bandit with little E.
The only benefits to dual throttles is the ability to do picture perfect hammerheads, spin recovery, donuts on the runway, the P38 immersion effect, and the ability to compensate for a missing wing by throttling back the opposing engine. (note: AKAK used the word 'immersion' in the past)
I absolutely hate twisty sticks, I've seen many of my students literally flop right out of the sky using them. They simply don't have the fine control you'd obtain from pedals, more so when snaprolling.