I bought a Coda at Christmas to use as my commuter/errand/flat pedal bike and absolutely love it. It's a great bike and you can't beat the feel of steel. I just don't think there is a comparison between steel and aluminum. Yes, aluminum is lighter but steel gives you such a smooth ride. Does the Allegro have braze ons for fenders and a rack? The Coda does which was a big selling point for me. But if you have to carry the bike up steps, the Coda is probably going to be heavier.

My best suggestion is to ride both of them if you can and then decide. If you keep going back to the Coda, there's probably a reason. Take your time and do some research and study both of them. You will pick the right one. Good luck.