Originally Posted by Anorak
A 180 degree firing order twin is going to have the same power delivery no matter the way the cylinders are arrayed. The perception of the smoothness will differ according to the cylinder arrangement. The mass of the crankshaft and flywheel will also influence power delivery and smoothness. As well as camshaft specifications and engine control electronics tuning.
Never miss an opportunity, do you?
I've ridden lots of bikes of all kinds of configurations. I prefer the opposed twin, but thanks for your unasked for opinion on my perceptions!