Opsis has a slimmer frame than the signal. I vote the DK as well however, but if u can afford it, the OG complete comes with top notch frame, fork, bars and stem with a 1pc crank vs the opsis' 3 pc and inferior aforementioned components. My friend had some freecoaster issues with his OG but that may have just been a fluke since they are both taska fc's. DK has a longer frame and offset fork compared to the OG's 0 offset fork.